Four teenagers were killed when their car left the road and struck a tree, police said today.
West Mercia Police said the victims, two men aged 18 and girls aged 17 and 16, died when a blue Rover 220 crashed off the A449 between Ombersley and Worcester at about 9.15pm last night.
Three of the victims were pronounced dead at the scene and the fourth died shortly after their arrival at the Worcestershire Royal Hospital.
A police spokesman said it is likely that no further information will be released until formal identification is completed and all next-of-kin are informed.
Meanwhile, officers are appealing for witnesses to the incident, which occurred on the southbound carriageway.
The road was closed until 4am today to allow investigators to examine the scene of the tragedy.
"We are anxious to hear from anyone who saw anything of the incident or the vehicle being driven earlier," the spokesman added.
Worcestershire coroner Victor Round has been informed of the deaths and post-mortem examinations are expected to take place tomorrow.
Anyone with information is urged to contact police on 08457 444 888.
The crash happened two days after three sixth-form students were killed in West Yorkshire.
Close friends Oliver Cross, Thomas Dunn and Michael Tempest, all aged 16, were killed when the car they were travelling in was in collision with another vehicle on the A58 near Wetherby.