A murder hunt is under way after a 16-year-old boy was stabbed to death as he got off a bus.
The teenager was found by police officers collapsed in the street in the Moseley area of Birmingham shortly after he got off the Number 2 bus at about 8.33am on Monday.
West Midlands Police said the motive for the attack is still unclear although initial inquiries suggest a dispute between two teenagers rather than a random attack.
The victim was rushed to hospital but died despite medics' efforts. The police have said it is not yet clear whether he was attacked on the bus or in the street.
Detective Chief Inspector Simon Wallis, investigating, said: "A murder investigation has today been launched following a stabbing in which a young man has needlessly lost his life.
"Our thoughts are with the family and friends of the deceased and specially-trained family liaison officers are supporting them during this very difficult time.
"We're working hard to understand the precise circumstances surrounding the attack.
"At this time it is unclear if the attack happened on the bus or in the street. Because of this I need anyone who was on the Number 2 bus this morning around Yardley Wood Road to contact me immediately. We are committed to finding the person or people responsible and bringing them before the courts."
Detectives are speaking to witnesses and scouring local CCTV which may have captured footage of the attack.
Meanwhile forensic inquiries continue and the crime scene in Yardley Wood Road remains shut to traffic, and is expected to remain closed for the rest of the day. The teenager's next of kin have been informed and a post mortem is due to take place in due course.