Kenya attacks: What you need to know
13 October 2011 Last updated at 21:01 BST
Gunmen have kidnapped two Spanish doctors working for the medical charity Medecins Sans Frontieres (MSF) near Kenya's border with Somalia.
In recent weeks, two other foreign women, one English, the other French, have been abducted near the border.
The BBC Swahili's Mariam Omar explains key points of the crisis.