An Indian man was found dead in a rented Pattaya room wearing a mask connected to a gas cylinder, his hands tied to the arms of his chair and his ankles bound together.

The renting agent told police she earlier received an email saying the man was hearing voices in his head and intended to commit suicide.

The man's body was found in Laguna Beach Resort 3 about 9.30pm on Tuesday. He was identified as Vibin Vijayakumar, 30, an Indian national, police said.

He had a mask over his face connected via a tube to a cylinder of nitrogen gas. He was sitting in a chair placed beside the bed, his hands fastened to the arm rests of the chair and his ankles tied together.

The air conditioner was still running when police arrived after receiving a call from the estate agent. They estimated he had been dead about 12 hours and said there were no signs of violence or that the room had been searched.

Police said it appeared that he committed suicide. The Police General Hospital would perform an autopsy.