At least three people have been killed in two explosions in Kenya's port city of Mombasa, leaving scores of others wounded.

The twin blasts are the latest in a series of attacks since Nairobi sent soldiers into neighbouring Somalia to drive out Islamist fighters with links to al Qaeda.

One of the blasts occurred at a busy bus transport terminal, known as Mwembe Tayari, where a device inside a minibus exploded killing three people, according to witnesses and media.

Emergency services could be seen on site of the attack, where shattered glass and debris littered the ground and blood stains marked the sides of a destroyed vehicle.

A second blast was heard at the Reef Hotel, which lies along the Indian Ocean coastline but no casualties were reported in that explosion.

Police cordoned off the site of the attack as shaken tourists gathered together outside of the hotel.

Wounded casualties were rushed to a local hospital, some bleeding heavily.

Mombasa police were not immediately available to comment.

There was no immediate claim of responsibility but Kenya has been hit in the recent past by gun and grenade attacks in Mombasa and in the capital Nairobi, which the government has blamed on the al Qaeda-linked Somali group al Shabaab.