It cannot be ruled out that Noah Donohoe may have been under the influence of drugs at the time of his death, toxicologists have told the inquest into his death (Family Handout/PA)

It cannot be ruled out that Noah Donohoe may have been under the influence of drugs at the time of his death, toxicologists have told the inquest into his death (Family Handout/PA)

It cannot be ruled out that Noah Donohoe may have had drugs in his system at the time of his death, toxicologists have told an inquest.

Forensic analysts said there was no evidence that the schoolboy was under the influence of drugs or alcohol, but the presence of some substances including so-called “designer drugs” cannot be excluded because of the limits of testing.