By Maria McCann
A fourth teenager has been arrested in connection with the sudden death of Caitlin White in Portadown.
The 15 year old boy has been questioned by detectives investigating the circumstances surrounding the schoolgirl's death last Saturday.
He has been released on police bail pending further enquiries.
The cause of her death is not yet known, but police say a link to drugs is one line of inquiry.
Sharing of explicit AI images in Armagh school being investigated by police
Long-awaited inquest into death of Belfast schoolboy Noah Donohoe due to start
Murder investigation launched following death of man in Coleraine
Man arrested over threats to elected representatives
Teachers’ unions welcome pay increase while pledging to tackle workload