A Dearborn cleric popular among Islamic State extremists helped radicalize one of the terror suspects in the London attacks that killed seven people Saturday, according to reports.

According to the Telegraph, a former friend of one of the three dead suspects claimed one of the attackers had been radicalized while watching Dearborn cleric Ahmad Musa Jibril's YouTube videos and said he contacted authorities after becoming concerned over his friend's extremist views.

The friend, who was not identified at the request of police, told the BBC's Asian Network: "We spoke about a particular attack that happened and like most radicals he had a justification for anything and everything and that day I realized I needed to contact the authorities."

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