Leader of the Better Together campaign, Alistair Darling, was accused of having "blood on his hands" over Iraq by hecklers during a visit to Glasgow Central Mosque.
While some people at the mosque shook his hands and posed for photographs, others looked on in disapproval and told them off.
One man demanded answers from Mr Darling on his views about the Israel-Gaza conflict, and on Labour's military intervention in Iraq under Tony Blair.
Abdull Oun, aged 27, said he was an undecided voter.
My question was very simple: If I vote No, what are your views on the conflict, what are your views on military intervention?
He didn't answer, he just walked away. He just waved his hand, I was basically dismissed. He demands answers from Alex Salmond on issues like currency, but he couldn't give me answers.> He came here to meet and greet Muslims but it is a publicity stunt and it has failed.
Better Together spokesman David Whitton later denied Mr Darling had "run off", and said Mr Oun had been part of a crowd and couldn't get close enough to actually ask his questions, but said he had been spoken to after Mr Darling's meeting with the mosque committee.
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