A section of a road in central Bangkok dramatically collapsed on Wednesday, leaving a large sinkhole that disrupted traffic.

The 50-metre deep sinkhole extended about 900 square metres in front of the Vajira Hospital, damaging infrastructure and prompted evacuations in the surrounding area.

One edge of the hole stopped right in front of a police station, exposing its underground structure.

There were no casualties but three vehicles were damaged, said Bangkok Governor Chadchart Sittipunt.

"The hospital has no problems, but we are worried about the police station," he said.

"That's still dangerous and the public has been evacuated."

He said officials believed the collapse was caused by construction work on an underground train station.

Footage on social media showed the road slowly s

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