LONDON, June 30 (Xinhua) -- Four young men were killed and three others injured in a road traffic collision in Leeds earlier Saturday morning, West Yorkshire Police said.

The four, aged between 18 and 21, were pronounced dead. The police said they were called to the collision between a grey Seat Leon car and a private hire vehicle, which was a grey Seat Alhambra people carrier, at 2:41 a.m. local time.

The killed were among the six occupants of the Leon, with the other two girls, aged 16 and 17, seriously injured. The 16-year-old remains in a critical condition, while the 17-year-old's injuries are not considered life threatening.

The driver of the Alhambra, a 42-year of man from Bradford, was taken to hospital with injuries that are serious but not life threatening.

Sergeant Fiona Hoodless of West Yorkshire Police Major Collision Enquiry Team said: "This is a very tragic incident where four young men have lost their lives and three other people are in hospital with serious injuries."

He said the police are carrying out extensive enquiries to establish the full circumstances surrounding this incident and that investigation is still at a very early stage. Early indications are that the Leon was travelling at speed at the time of the collision.