(CNN) Malaysian golfer Arie Irawan died in his hotel room at the age of 28 while competing at a tournament in China, with "early indications" suggesting his death was due to natural causes.

Irawan missed the cut at the Sanya Championship but remained on the island, according to a statement on the PGA Tour Series China's website.

The governing body said his roommate, Kevin Techakanokboon -- who was getting ready for the final round -- noticed Irawan wasn't moving in his bed Sunday and called another player for assistance.

Later, local emergency services arrived, but after 45 minutes of trying to revive Irawan, he was pronounced dead.

Arie Irawan, seen here at a tournament in 2017, died Sunday in his hotel room in China.

"Early indications" are that the "death was from natural causes," the PGA Tour Series China said on the website. But it added that the "coroner has not completed his report."

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