Australian national, 27, dies while on holiday in Thailand after collapsing in his Pattaya hotel room

A 27-year-old Australian man was found dead in his hotel room in a popular Thai resort town.

Thai police said the unidentified man collapsed in a fourth-floor room of a Pattaya hotel in the presence of his allegedly very intoxicated friend on Wednesday.

Hotel staff called first responders to the room and when they arrived they found the man lying dead face up on the floor wearing only a pair of shorts and a fanny pack, local media report.

Police allege they found ketamine, cannabis and drug paraphernalia in the room, on a table, which were seized as evidence.

The 27-year-old’s friend was reportedly found in a confused and frantic state.

Emergency workers provided first aid to the friend before rushing him to the hospital for treatment for a possible drug overdose.

Hotel staff told police they heard loud noises coming from the room, before alerting police and searching for the source.

Police said the man yelled at staff that his friend was unresponsive and wouldn’t wake up.

Police took evidence from the room and reportedly focused their initial investigations on whether the 27-year-old may have overdosed on ketamine.

His friend will be the subject of interviews and interrogations as soon as he recovers from his alleged poisoning, while Thai detectives continue to gather details and establish a precise cause of his death.

Although marijuana has been decriminalized in Thailand, ketamine is classified as a schedule two illegal drug, and anyone found in possession of it could be charged with possession.

Penalties for possession and use of a schedule two substance in Thailand can include prison sentences of one to five years and fines ranging from $1,000 to $4,500.

Daily Mail Australia has contacted the Department of Foreign Affairs and Trade for comment.