A cargo plane hit a vehicle on the runway at Hong Kong's airport during landing and skidded into the sea, killing two ground crew workers, authorities have said.

A cargo aircraft skidded off a Hong Kong runway and collided with a security patrol car before both fell into the sea early Monday, killing the two people in the car, authorities said.

All four crew members onboard the cargo plane survived and were taken to hospital for treatment.

The airport employees were killed after the aircraft collided with the security patrol vehicle they were in and pushed it into the sea.