At least one person was killed Monday evening and 13 others injured in a second explosion to hit Nairobi in 24 hours.
The 8pm explosion was believed to have been a grenade hurled at a moving matatu near a crowded terminus between Race Course and Landhies roads in Nairobi.
The injured were taken to Kenyatta National Hospital for treatment as security officers drawn from the General Service Unit and the police cordoned off the scene opposite the former Jack and Jill Supermarket.
The covered body of the dead person was still at the scene when the
Nation team arrived.
Witnesses said the grenade was thrown at a matatu full of passengers, but bounced off its window and exploded in a crowd of people rushing to board buses.
A police officer, who sought anonymity, said they had collected the remains of the explosive device, which they identified as a hand grenade.
The Kaka matatu terminus serves the Kiambu, Githunguri and Ndumberi routes and is close to St Peter Clavers Church, the Salvation Army Church and is only a few metres from the normally crowded OTC stage, which serves matatus to Nairobis Eastlands.
The last explosion at the OTC was the failed assassination attempt against then popular Nyandarua North MP JM Kariuki in 1975
The explosion came hardly 24 hours after another hand grenade was hurled into a night club along Mfangano Lane in the city, injuring 14 people.
One of those injured in the second blast was taken to theatre in bad state. Most of the victims sustained injuries on their legs.
Following the two explosions, Internal Security PS Francis Kimemia announced a ban on fireworks displays during Diwali and Christmas festivities.
A major crackdown on illegal Somali immigrants was also under way in the country on Monday.
Arrests were reported in Malindi and Nakuru with some of those seized already charged in court.
Disowning operation
In Nairobis Eastleigh area, a suburb which has been nicknamed little Mogadishu because of the large number of Somali residents from Kenya and Somalia, tension was high.