Two teenagers have died and three others were injured when their car overturned in Bridgend.
South Wales Police said two 19-year-old men were killed in the crash just before 0400 BST on Sunday at Blackmill.
Police said the driver "lost control" of the Vauxhall Corsa on the A4061, at a spot known as Blackmill Bends as they travelled north.
Three others in the car were treated at the scene for minor injuries.
South Wales Police said families had been informed.
The car involved was a new model Vauxhall Corsa, which was white in colour. It is believed those who died had been in Bridgend town centre on the evening before the crash.
In a statement, a force spokesman said: "It is known that the vehicle was travelling north along the road in the direction of Blackmill when control was lost and the collision took place."
The A4061 was closed for several hours in both directions but has since re-opened.
An appeal for witnesses has been launched, or for anyone who may have seen the vehicle being driven before the incident.
Police are also keen to know who may have seen the vehicle or its occupants during the evening of Saturday 16 October in Bridgend town centre.
Anyone with any information is asked to contact South Wales Police on 101 or Crimestoppers on 0800 555111.