Kenya has sent troops into Somalia in a bid to pursue militants it suspects of carrying out a spate of kidnappings.
Government spokesman Alfred Matua said troops were pursuing Somali al-Shabab militants across the border, reports the BBC.
Two Spanish aid workers were abducted from Kenya's sprawling Dadaab refugee camp on Thursday.
And a British woman and a French woman have been kidnapped from remote beach resorts over the past month, dealing a major blow to Kenya's tourism industry.
Kenya's internal security minister, George Saitoti, announced on Saturday that forces would be sent to fight al-Qaeda inside Somalia.
Kenyan defence minister Yusuf Mohammed Haji said: "If you are attacked by an enemy, you are allowed to pursue that enemy until where you get him. We will force them far away from our border."
By Diane Evans
Monday, October 17, 2011