The day after a far-right extremist murdered 51 worshippers in two mosques in the New Zealand city of Christchurch, Mr Mohammed Kozbar received a chilling telephone call in London.
"The caller said 'your congregation will be next,'" says Mr Kozbar, chairman of Finsbury Park Mosque. "Imagine something like that. Maybe he was serious or maybe he wasn't, but we couldn't take any risk."
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