Two men have died following a police chase, officers said.
The pair, aged 33 and 38, were killed after the Audi they were travelling in jumped a red light, clipped a white van and collided with a bridge.
The car's driver was arrested on suspicion of causing death by dangerous driving and driving while disqualified after he allegedly tried to flee the scene on the Seven Sisters Road in Haringey, north London, Scotland Yard said.
The two dead men have not been identified.
They were killed after officers on routine patrol became suspicious of the Audi, which appeared to make off at speed when it was driven past police just before 2am.
After several minutes searching for the car - which had been travelling in the opposite direction - they spotted the vehicle several hundred yards away and sought to catch up, Scotland Yard said.
The Audi was driven through a red light before it hit the van and then crashed into the bridge.
A police spokesman said: "Two male passengers in the Audi, both believed to be aged in their late 20s or early 30s, were seriously injured. Officers gave CPR prior to the arrival of ambulances, but both were pronounced dead at the scene. Inquiries continue to establish the identity of the two men."
The 30-year-old driver of the Audi tried to escape on foot before he was arrested. He was taken to hospital but his injuries are not believed to be serious. The driver of the white van was taken to hospital with minor injuries.
Traffic officers are investigating the collision and roads surrounding the scene were closed. The Metropolitan Police's directorate of professional standards has been informed.