Minibus 'hit by grenade' in Kenya's capital Nairobi Published duration 19 November 2012

media caption Bernard Kibe, bus driver: "I heard a loud bang and I suddenly realised I had been lifted off the ground"

A blast has killed at least six people on a crowded minibus passing through a suburb of Kenya's capital, Nairobi, that has a large Somali population.

A grenade was thrown into the vehicle in the Eastleigh area, police said, ripping the roof and sides off the bus.

A number of recent attacks in Nairobi and Mombasa have been blamed on Somalia's al-Shabab militant group.

Earlier this year, Kenya sent troops into Somalia to pursue militants.

Kenyan forces ousted the Islamist rebels from their last Somalia stronghold, Kismayo, last month.

After Sunday's blast, police fired into the air to disperse crowds of youths who targeted Somali residents in retaliation.