One speaker at the meeting, held on the anniversary of the attacks in America, told the assembled crowd that the West should "listen to the warnings."
The meeting, in front of a 100-strong crowd at a community centre on the Lea Bridge Road in Walthamstow, east London, was also addressed by the exiled preacher Omar Bakri Mohammed via video link from the Lebanon.
His appearance was greeted by cheers of "faith" and "god is great" as he claimed to have foiled a bomb plot against him by agents of the British Government, although much of his speech was inaudible due to technical difficulties.
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