At least four people have been killed in a huge fire that has engulfed multiple high-rise buildings in Hong Kong's Tai Po district.

At least three more are injured, two of whom are in a critical condition, a government statement said. There are fears that some people may still be trapped in the buildings, local media reports.

Footage shows flames and thick clouds of grey smoke billowing from the towers of the Wang Fuk Court housing complex on Wednesday afternoon.

The cause of the fire is unknown, but the flames are believed to have spread quickly through bamboo scaffolding that covered the outside of the tower blocks.

The fire department has told the BBC that one of the confirmed deaths was a firefighter.