article_snippet.sent: Scotland Yard counter-terrorism officers are investigating whether Mr Arwani, a fierce critic of Syrian president Bashar al-Assad, was murdered on the orders of the regime.
article_snippet.sent: Mr Arwani was a fierce critic of Syrian president Bashar al-Assad, who is pictured above in September 2013 .
article_snippet.sent: Mr Arwani fled Syria in 1982 after a massacre in Mr Arwani home city of Hama carried out on the orders of Assad's father, Hafez.
article_snippet.sent: The imam, who moved to Britain in the mid-1990s after studying Islamic law in Jordan, claimed Mr Arwani was sentenced to death in Mr Arwani absence by the Syrian regime.
article_snippet.sent: Mr Arwani was involved in violent anti-Assad demonstrations outside the Syrian Embassy in London three years ago.
article_snippet.sent: Mr Arwani Mr Arwani told reporters during the demonstration: 'This building belongs to the Syrian people, not a regime killing people every single day for ten months.'