Hundreds of residents leave a Nairobi slum as police move against criminal gang.
At Nairobi‘s Kenyatta hospital, staff said 37 people were hurt, four critically.
One witness said: “We saw a person rushing towards a City Hoppa bus, then it was as if he changed his mind and rushed back.”
“He was carrying a small carton. I think he was trying to run into the restaurant with the box but I saw it explode at the door. I saw about eight people lying on the ground.”
The blast came after weeks of violence by a criminal society called the Mungiki, which beheads its enemies.
At least 30 people were killed by police last week in raids on a Nairobi slum which is a stronghold of the gang.
Tribal and criminal violence traditionally flares before elections, and a presidential poll is due in December.
Separate bombs blamed on al-Qaeda killed more than 200 people at the US embassy in 1998, just a few blocks from Monday’s blast, and 15 at an Israeli-owned hotel in Mombasa in 2002.