A 25-year-old man died while watching television because of gastric problems, Tamil Nesan reported.
A. Pandiyaraja was lying on a sofa while watching television with his sister Papayee, 35, in her house in Tampin last Saturday.
She thought her brother had fallen asleep and tried to wake him.
When there was no response, Papayee noticed that her brother's body was cold and stiff.
She lodged a report at the police station.
Police said post-mortem reports stated that Pandiyaraja died due to gastric problems.
A relative, K. Sangaran, said Pandiyaraja was a healthy man and was staying with his sister because he was unemployed.