Three British tourists died on Feb. 27 while climbing waterfalls in Vietnam.
It is believed one of the group slipped while around the Datanla Falls in Lam Dong province, and the others were then accidentally taken down, BBC reports. The bodies were found downstream from the waterfall.
The Datanla Falls are a must-see attraction for Western tourists.
The victims have been identified as Christian Sloan, 25, and half-sisters Isobel Squire and Beth Anderson, aged 19 and 25, respectively.
"Christian's death is a very sad loss to us,” Sloan’s family said. "He was a very popular young man, formerly in the Royal Navy, who had many, many friends not just locally but around the world."
The tour guide was allegedly unlicensed and did not pay for entrance tickets, The Independent reports. He has been questioned by police but no arrest has been made.
The victims were not using safety ropes while exploring the falls.
"When we found the bodies, we found their helmets and safety jackets but no ropes,” Deputy Chairman of Lam Dong Province Nguyen Van Yen told the BBC. "According to our initial investigation, after visiting the Datanla waterfalls, they went to the forest to another area for canyoning. On their way, they passed through a stream which flowed into a waterfall. Unfortunately a person slipped, taking the other two with them."
James McGlashan had been scheduled to go on the tour the group booked through their hotel but illness kept him away.
He identified the bodies.
"As in much of the rest of South East Asia, law enforcement in Vietnam is weak, and a culture of accident prevention is almost non-existent," BBC South East Asia correspondent Jonathan Head said.
The UK Foreign Office is providing support for the victims families.