Muslim leaders in Britain will use sermons today to call for the release of all hostages held by the Islamic State (IS).
Imams will use Friday prayers to reiterate their opposition to extremism and urge young people not to join fundamentalist fighters.
In a joint statement, the Muslim Council of Scotland, Islamic Society of Britain and Glasgow Central Mosque said the Muslim community "unequivocally condemns the barbaric actions of IS (formerly known as ISIS).
It added: "We send our heartfelt sympathies to the families of those who have been killed at the murderous hands of IS - regardless of where they are from or what their religion.
"The actions of IS are against the teachings of Islam and therefore supporting or joining such an organisation is unacceptable.
"We call for the immediate release of all hostages held by IS and pray for all of those killed, injured or harmed by extremism the world over."
I've been told at the Nato summit that the intelligence services know exactly who 'Jihadi John' is - or at least are 99.9% certain.
The British aid worker being held by Islamic State is David Haines, a 44-year-old father-of-two from Perth, Scotland.
In a video statement which claims to record his final words US hostage and journalist Steven Sotloff blames US foreign policy for his death.