Three British tourists have died while climbing waterfalls with an unauthorised tour guide.
The bodies of the tourists, who according to reports were two women, aged 19 and 25, and a man, were recovered at the Datanla waterfalls in Lam Dong province - a popular tourist spot.
It remains unclear exactly how the three holidaymakers died, and their guide is being questioned by police.
The Foreign office confirmed three British people had died and said it is in contact with the authorities in Vietnam.
Vo Anh Tan, deputy director of the Lam Dong joint stock tourist company which manages the Datanla waterfalls, said visitors usually start at the top of the tiered waterfall, which is popular among Western tourists.
Mr Tan said an unauthorised local private tour operator arranged the tour and apparently did not pay for entrance tickets and did not use the company's safety equipment.
He said the guide was detained by police for questioning.
A Foreign Office spokesman said: "We are providing support to the families of three British nationals following their deaths near Da Lat, Vietnam.
"Our sympathies are with their families and friends at this difficult time. We are in close contact with local authorities in Vietnam on their behalf."
The bodies were recovered downstream from the waterfall.
Police believe the tourists might have slipped when exploring the area, according to local news reports.