Troops from the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) are seen on the back of a flat-bed military truck in the early morning ahead of an advance on the Somali port city of Kismayu in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

Troops from the Kenyan contingent of the African Union Mission in Somalia (AMISOM) sit on the mid-section of a military truck in the early morning ahead of an advance on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

A soldier from the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) sits inside an armoured personnel carrier during an advance on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

Troops from the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) sit on the back of a flat-bed military truck in the early morning ahead of an advance on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

Troops from the Kenyan contingent of the African Union Mission in Somalia (AMISOM) sit on the back of a flat-bed military truck in the early morning ahead of an advance on the Somali port city of Kismayu in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

Troops from the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) sit on the back of a flat-bed military truck as they begin an advance on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

Toops from the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) form-up in the early morning ahead of an advance on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

Soldiers from the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) stand on the rise of a hill during an advance on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

Soldiers of the Somali National Army (SNA) watch from the roadside as a convoy carrying troops from the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) begins an advance on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

A fighter of the Ras Kimboni Brigade, a Somali government-allied militia, walks along a road as a soldier from the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) runs in the other direction during an advance on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

Fighters of the Ras Kimboni Brigade, a Somali government-allied militia, are seen in thicket on the back of a machine-gun-mounted battle wagon as they wait to join troops from the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) ahead of an advance on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

Soldiers of the Somali National Army (SNA) are seen riding on the back of a machine-gun-mounted battle wagon as they join troops from the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) ahead of an advance on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

Fighters of the Ras Kimboni Brigade, a Somali government-allied militia, are seen riding on the back of a machine-gun-mounted battle wagon as they join troops from the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) ahead of an advance on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

Fighters of the Ras Kimboni Brigade, a Somali government-allied militia, walk along a road during an advance with the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

Soldiers of the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) look on as fighters of the government-allied Ras Kimboni militia walk along a road during an advance on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

Soldiers from the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) stand on a road next to their military vehicles during an advance on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout
 

An officer from the Kenyan Contingent of the African Union Mission in Somalia (AMISOM) looks through binoculars during an advance on the Somali port city of Kismayu, in this handout photograph taken October 2, 2012 by the African Union-United Nations Information Support Team and released October 3, 2012. African Union troops and tanks occupied al Shabaab's former stronghold of Kismayu on Tuesday, but the Somali Islamist militants gave notice of their intention to fight back, saying they detonated a bomb in the port city. *******/African Union-United Nations Information Support Team/Stuart Price/Handout