Greater Manchester Police have said they made "exhaustive attempts" to establish if a letter allegedly sent by Moors murderer Ian Brady to his mental health advocate Jackie Powell, would have helped assist them in finding the remains of one of his victims.
Martin Bottomley, head of investigative review in Greater Manchester Police's major and cold case crime unit, said:
As soon as we were made aware of the existence of this alleged letter, we made exhaustive attempts to obtain it to establish whether or not its contents would assist us in finding Keith [Bennett's] body.
However, despite seizing numerous documents and a search of Brady's cell, no such letter has been recovered.
That in itself does not prove or disprove the letter's existence. It might have been destroyed, it might be hidden elsewhere, it may be in someone else's possession, or it may simply never have existed in the first place and this has been yet more mind games by Brady.
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Scotland Yard said the male youths will appear in custody at Westminster Magistrates' Court on Saturday.
Windy this weekend with gales across northwestern parts of the UK. Rain spreading southeast.
Greater Manchester Police said "inquiries are ongoing to fully understand the circumstances of the incident."