Anan Sahoh was found dead slumped in a train carriage the day after this incident was filmed.

Horrifying video shows man infected with coronavirus spitting in the face of another traveller at a Bangkok train station before boarding a train and dropping dead.

Police said Anan Sahoh, 56, tested positive for the virus after he was discovered dead on the train from Bangkok to the southern city of Narathiwat on Tuesday.

Investigators traced Mr Sahoh’s steps and found CCTV footage of him spitting on an unidentified man queuing to buy tickets at Bang Sue Train Station in Bangkok, Metro UK reported.

The video showed Mr Sahoh breezing through a mandatory temperature check to board the train, where he was seen vomiting and coughing a short time into the journey.

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He was found fatally collapsed in front of the toilets after the train pulled into Thap Sakae district station, the report said.

Health workers ran tests on his body, which came back positive for the coronavirus.

Thailand’s State Railway director Thakoon Intrachom said authorities were now trying to track down the man who was spat on and potentially exposed to the deadly virus.

“We are now worried about a man that was spat at in the security camera footage,” he said.

“Initially, we co-ordinated with the railway police but they have not found him yet. We want to announce that if anyone knows him or if he has heard about the news, then he should please go to the hospital immediately.”