Mohammad Zakaria Ahmad, a senior police official leading the investigation into the death of Briton Gareth Huntley, said he was investigating reports of a fight involving Mr Huntley shortly before his disappearance.
"These are rumours but we are looking into them," he told the Sunday Telegraph.
Mr Huntley's body was found in a pond just yards from a kayak storage shed at the Juara Turtle Project where he had been volunteering. The cause of death has not yet been established.
More top news
A giraffe has been born in front of visitors to a zoo in Devon.
Viewers have complained that the act between French ventriloquist Marc Metral and his dog, Miss Wendy, is cruel.
Mother of Bobbi and Christi Shepherd accuses former Thomas Cook CEO Harriet Green of trying to use their memory to gain public sympathy