An Uber driver in Singapore has died from a heart attack at the wheel, with his passenger still in the car.

Wang Yongqing, 64, had picked up a passenger at Singapore's Changi Airport last Thursday, but was forced to pull over shortly afterwards.

The distraught male passenger called for help, but Mr Wang died on his way to hospital, local news report.

Wang Yongqing, 64, had picked up a passenger at Singapore's Changi Airport last Thursday, but was soon forced to pull over after suffering a cardiac arrest behind the wheel

Mr Wang's brother said he had been working two jobs for the past six months and that this could have caused his death.

Wang Yongshun, 62, who lived with his brother said he had been driving for Uber on top of his normal job six months ago, Straits Times reports.

Mr Wang worked driving construction workers to building sites from the early hours in the morning until 5pm, after which he would start his Uber shift until 1am.

His brother said Mr Wang had been 'increasingly fatigued in the past few weeks'.

Uber has been criticised for not doing enough to vet its drivers, who are self-employed but picks up fares through the company's app.

Mr Wang's brother said he had been working two jobs for the past six months and that this could have caused his death

This was given as one of the reasons why Transport for London decided to strip the ride-hailing service of its license to operate in the British capital.

Among the factors considered by the regulator was Uber's 'approach to reporting serious criminal offenses' and its use of software designed to evade the authorities.

Earlier this week, an Uber passenger was left stranded in Perth, Australia after their driver tested positive to driving while on methamphetamine.

The man was caught by a random drug and alcohol police operation, and Western Australian police tweeted the image of the man's test, showing a positive result for meth.

Uber Australia said it was investigating the incident.