A heated argument between two Muslim leaders has highlighted community divisions ahead of a high-level meeting to discuss the radicalisation of young people.

Moments before Premier Mike Baird and Police Commissioner Andrew Scipione entered the meeting with Muslim community leaders on Monday, the chairman of Parramatta Mosque and the Grand Mufti of Australia had a volatile discussion in Arabic.

One community leader who was present said the two men were arguing over a perceived lack of community support from the Grand Mufti and they ended by telling each other to "shut up".

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