The Ahmadiyya Muslim Community UK (AMC), which represents an estimated 30,000 Ahmadis, launchedwalk-through metal detectors, identity checks and bag searchesto screen visitors and worshippers for knives and firearms recently at the Baitul Futuh mosque in south London.
The minority Islamic sect, which is disowned by some Muslims, has also sought Scotland Yard's intervention over the death threats to its leader Hazrat Mirza Masroor Ahmad, The Sunday Times reports.
Farooq Aftab, a spokesperson for the AMC, told the newspaper that while it was common for Ahmadis to be persecuted in countries such as Pakistan, similar violent and divisive behaviour should not be tolerated in Britain.
"Our community is under attack by extremists but our commitment to peace and love is unshakeable. We appreciate the work of the authorities and they must continue to work diligently for the protection and safety of all citizens," he added.
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Ahmadis, who make up 1 per cent of the UKs 3 million followers of Islam, are persecuted in some countries because of their religious beliefs.
"It is, frankly, sickening that some think they can openly harass, intimidate, vandalise and create a sense of fear within minority Muslim communities while shouting out about Islamophobia and the need to challenge it," said Fiyaz Mughal, director of interfaith organisation Faith Matters.
Fears among the Ahmadi community in Britain have heightened following the murder of Asad Shah, a member of the Ahmadiyya sect who was stabbed to death in Glasgow in March last year by a Sunni Muslim taxi driver from Bradford.