Two teenage boys have died after being stabbed in Bristol on Saturday night.
The 15-year-old and 16-year-old were attacked "by a number of people who made off from the scene in a car", according to Avon and Somerset Police.
The teenagers were taken to two hospitals - Southmead Hospital and Bristol Royal Hospital for Children - by ambulance, where they died in the early hours of Sunday.
Neither boy has yet been identified and post-mortem examinations will be carried out later.
Two people have been arrested - a 44-year-old man and a 15-year-old boy - and they remain in police custody. A vehicle has also been seized.
Officers launched a murder investigation in the wake of the deaths and police said further suspects are being sought who were involved in the incident.
A vigil was held near the scene on Sunday, where people lit candles and placed flowers for the victims.
Bristol Commander Superintendent Mark Runacres also said detectives want to speak to passengers on a bus that was on Ilminster Avenue at the time of the "shocking and tragic incident".
"Our collective thoughts are with their families at what is undoubtedly a very difficult time," Mr Runacres said in a statement.
"Specialist family liaison officers will now be assigned to the families to provide them with support and keep them updated on the investigation."
The police commander also said a cordon remains in place on Ilminster Avenue between Newquay Road and Tavistock Road, and noted "members of the public can expect to see a large police presence as forensic searches and other inquiries are conducted".
Mr Runacres said house-to-house inquiries were underway and several witnesses had been identified.
He also confirmed CCTV and doorbell footage was being gathered and a mobile police station was being set up near the scene.