Three killed, dozens wounded in twin Nairobi bus bombings.

At least three people have been killed and 60 others hurt after bomb attacks against two buses in the Kenyan capital Nairobi.

The vehicles were being driven along a busy highway when the homemade explosive devices went off.

Some reports said the devices had been placed on the buses, while other reports said they were grenades which had been thrown at the vehicles.

The blasts happened in the Thika Road area, close to the city centre, and the scene was quickly sealed off, witnesses said.

TV pictures showed a large red passenger bus with a large hole ripped out of its side, and a green bus with its roof and sided buckled by an explosion.

It comes a day after two explosions rocked the port city of Mombasa, killing four people.

They died after attackers threw a grenade at passengers at a busy bus station in Mwembe Tayari, near the city centre.

A second blast went off outside a luxury hotel after the device was found on a beach - but no-one was killed.

At the bus terminal, victims were sprawled in a pool of blood and the road was littered with shattered glass from a bus.

"I didn't see who threw the object, but I heard a loud explosion before I fell to the ground. I then felt my legs go numb," Halima Sidi, 26, who works at a local supermarket, told Reuters at a hospital as nurses bandaged her wounded legs.

Mombasa county commissioner Nelson Marwa said: "What happened is a grenade was thrown at passengers.

"The attackers were riding on a motorbike, and lobbed the grenade at the crowd of people at the bus terminus."

An unattended bag was found on the beach, which was abandoned at the gate of the hotel after it was found to contain what turned out to be an explosive device, which then went off.

Hotelier Mohammed Hersi told Sky News there had been no injuries and all the guests were safe.

There was no immediate claim of responsibility for the latest attacks.

But Kenya has blamed similar assaults on al Qaeda-linked Somali group al Shabaab, which killed at least 67 people at the Westgate shopping mall in Nairobi in September.