FBI in Kenya?

Okay, the United States just did a strike against Al-Qaida agents in Somalia. According to ABC News, FBI agents were sent to Kenya to catch any suspects fleeing from Somalia. I was under the impression that the FBI was a domestic agency. That it was not authorized to operate outside of America. Unless a friendly country invited some agents over as observers when it picked up a Most Wanted person. So what is a domestic agency doing in Kenya?