YouTube videos featuring an Islamic cleric from Dearborn allegedly helped to radicalize one of the suspects killed in the last weekend's London Bridge terrorist attack, British media sources reported.

According to The Telegraph, a person who knew one of the terrorists claimed the man's extremist views grew after listening to "hate speeches" by the American Islamist Ahmad Musa Jibril.

Seven people were killed and dozens more were injured Saturday night when a vehicle was driven into pedestrians on the London Bridge by three men, who then began attacking people with knives in a nearby area crowded with restaurants and bars.

British authorities described it as a terrorist attack. All three suspects were killed by police.

On Monday, British authorities released the names of two of the attackers.

Khuram Shazad Butt was a 27-year-old Pakistani-born Briton known to authorities, London Police said in a statement, according to the Associated Press.

Rachid Redouane, who had claimed to be Moroccan and Libyan, had given his age as 30 or 25, and also used Elkhdar as a surname. He was not known to police.

The name of the third attacker has not been released.

Since the killings, 10 other people have been arrested in the east London area of Barking, where the two named suspects lived. Those people remain in custody, the AP said.

A former friend of one of the terrorists killed by police told the BBC's Asian Network the man had been radicalized watching Jibril's videos. The friend said he'd earlier alerted police.

"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," according to The Telegraph.

He added: "He used to listen to a lot of Musa Jibril. I have heard some of this stuff and it's very radical. I am surprised this stuff is still on YouTube and is easily accessible. I phoned the anti-terror hotline. I spoke to the gentleman. I told him about our conversation and why I think he was radicalized."

The Counter Extremism Project group lists Ahmad Musa Jibril as an Islamist preacher who has "reportedly influenced Westerners to fight in the Syrian conflict ... although he doesn't specifically call upon his followers to join jihadi groups."