A grenade was thrown at British tourists in Kenya yesterday but it failed to explode.

The travellers came under attack while travelling by road from the Indian Ocean coastal resort of Diani to Mombasa.

The tourists continued on their way to a wildlife safari at one of Kenya’s national parks.

The Foreign and Commonwealth Office confirmed that a failed grenade attack on a vehicle took place yesterday in the Likoni area of Mombasa.

“The grenade has been detonated safely by experts,” said Robert Kitur, police chief for Mombasa told the AFP news agency.

“We are investigating the incident and looking for the man who threw the grenade at the tourists and fled.”

He added: “We are appealing to everybody to exercise caution, especially over this festive season, and to share information with security agencies to win the war on terror.

“We have intensified security at tourist hotels and other vital installations to avert terrorism attacks.”