British tourists are being warned they should stay inside their resorts in Montego Bay, Jamaica.
The Jamaican government has declared a state of emergency in the St James parish, after a number of "shooting incidents".
The Foreign Office has told British tourists to stay in the confines of their hotels as a "major military operation" takes place.
About 200,000 British tourists visit Jamaica every year.
A spokesman for the Foreign Office said: "[Tourists] should follow local advice including restrictions in selected areas, and exercise particular care if travelling at night.
"[They] should stay in their resorts and limit travel beyond their respective security perimeters."