FBI agents join Kenya blast probe
FBI agents are assisting Kenyan officials with the investigation into a large explosion in central Nairobi.
At least 33 people were injured when the blast ripped through a building full of small shops on Monday, including a woman who blamed a "bearded man" who left behind a bag shortly before the detonation.
A Kenyan official confirmed the FBI's involvement on Tuesday.
The intelligence firm IntelCenter said militants from the al Qaida-linked Somali group al-Shabab had bragged about conducting interviews with survivors after the blast.
IntelCenter said the development poses significant challenges to security forces and legitimate members of the media covering attacks.