Kenyan police have released photographs of a man they allege bought the four-wheel drive vehicle that suicide bombers used in the attack on an Israeli-owned hotel near Mombasa.

A $6,000 reward has also been offered for information leading to the arrest of 23-year-old Saleh Ali Saleh Nabhan, a resident of Majengo in Mombasa.

In the attack, three suicide bombers driving a Pajero packed with explosives, killed 13 people, three of them Israelis, at the Paradise Hotel.

Police say he bought the Pajero on 15 November from one of the people being held by police and they say they cannot rule out that he may have been one of the suicide bombers.

'Secretive'

Police say his family confirmed that he left home before the attack, saying he was going to South Africa to look for work.

Kenyan tourism is suffering since the attack

Police described him as secretive, and said most of his friends were of Somali origin.

They say he was married to a Kenyan woman and has one child.

On Monday, police released computer-generated images of two men they suspect carried out last month's failed simultaneous missile attack in Mombasa on an Israeli airliner.

The police also announced a $6,000 dollar reward for information leading to the arrest of each man.

The two men were not named, but police believe the men are in their 30s.

A statement dated 6 December, purportedly from the al-Qaeda network, claimed responsibility for the twin attacks and threatened more attacks on Israeli and US targets.

Kenyan police are still questioning a number of people in connection with the attacks.

Tour operators in Kenya are reporting a large number of cancellations.