SINGAPORE - A car caught fire on the Pan-Island Expressway (PIE) on Wednesday evening (Jan 10), causing a build-up of traffic.

A video shared by a Straits Times reader shows a car engulfed by fire, and an explosion can be heard.

The Singapore Civil Defence Force said it was alerted to a vehicle fire on the PIE towards Tuas after Clementi Avenue 6 at about 8.55pm.

The police said they were alerted to an accident involving three cars on the expressway and they are investigating.

ST reader Jacky, who is an Uber driver, said: "I saw a few policemen directing traffic. The car was totally engulfed in flames. I heard an explosion."

The Land Transport Authority took to Twitter to ask motorists to avoid lanes 1 and 2. Traffic camera footage on the One.Motoring website shows that traffic is still heavy in the area at 10.15pm.

Firemen extinguished the blaze using a water jet. There were no injuries.

The cause of the fire is under investigation.