North Yorkshire Police issued a lunchtime update on their investigation into the death of a boy who had taken drugs.
They are still not in a position to name the boy, who was 15 and from New Earswick.
He was found in an alley off Hospital Fields Road at 4am on Sunday and died in hospital.
Police say he had taken illegal drugs.
A police spokesperson said: “Two 14 year old boys who were arrested have now been released under investigation pending further enquiries.
“A 15 year old girl, a 16 year old boy, a 33 year old woman and a 37 year old man all remain in police custody.”
If you have any information about the incident, or if you saw a group of teenagers in the Fulford area of York in the early hours of Sunday 28 September, please get in touch with police.
Dial 101, press 1 and pass information onto the Force Control Room, quoting reference number 12200169915.