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
