British holidaymakers to Tunisia have been warned to be vigilant following an apparent suicide bombing on the beach next to a hotel in Sousse.

The Foreign & Commonwealth Office updated its travel advisory in the wake of the explosion close to the Riadh Palms Hotel yesterday.

The only reported casualty was an individual who was believed to have been carrying explosives, the FCO said.

Two other people who were found in possession of explosives at the mausoleum of former president Habib Bourguiba in Monastir have been arrested.

“The British Embassy in Tunis is in close contact with the Tunisian authorities,” the FCO said. “Embassy staff are travelling to Sousse to offer support and advice.”

It added: “You should be vigilant, keep up to date with this travel advice, and follow the advice of the local authorities and your tour operator.”

Almost 33,000 Britons travelled to the north African country last year.

“Most British tourists stay in the coastal resorts and most visits are trouble free,” the FCO said.

The 650-room Riadh Palms is featured by UK travel companies including Expedia, Lowcostholidays, Monarch and