A man has been left seriously injured after being assaulted and struck by a van.
The incident happened in the Drumleck Gardens area of Londonderry at 1.40am on Sunday.
The attacker than made off in the van, police said.
The 32-year-old victim was taken to hospital.
Detective Inspector Conor McStravick has issued an appeal for information.
"We would like to hear from anyone who was in the area or who may know the current whereabouts of the van, which is believed to be a blue Vauxhall," he said.
"Detectives can be contacted at Strand Road police station by calling 101, quoting reference 225 26/05/19."