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Police officers escort a woman to a police van after raiding a block of apartments in east London.

London cops have arrested 12 people in connection with terror attack that killed seven, the city’s the Metropolitan Police Service announced Sunday morning.

Authorities collared eight people in Barking, east London, and are still searching other homes in the area, the department said in a statement.

Barking was home to at least one of the attackers shot dead by police during the assault Saturday night, according to local reports.

One resident said the guy had been kicked out of a local mosque, Jabir Bin Zyad, after getting into a dispute with the imam.

“It was about two months ago and he started questioning what the imam was saying. I can’t remember exactly what it was about but was asked to leave. He didn’t want to and was forcibly taken out,” Salahudee Jayabdeen, 40, told The Guardian.

In addition to those killed in the attack, 48 victims are still in the hospital, about half with life-threatening injuries, officials said — among them a British Transport Police officer and an off-duty Metropolitan Police officer.

The news comes hours after British Prime Minister Theresa May gave a speech saying the country has shown “far too much tolerance” for Islamist extremism and vowed to stamp it out.

“The whole of our country needs to come together to take on this extremism, and we need to live our lives not in a series of separated, segregated communities, but as one truly United Kingdom,” the conservative leader said.

May suggested that “cracking down” on terror in the country could include tighter internet regulation.

“We cannot allow this ideology the safe space it needs to breed. Yet that is precisely what the internet, and the big companies that provide internet-based services provide,” she said.

The PM also detailed the latest account of Saturday’s attacks on London Bridge and nearby tourist hotspot Borough Market.

At around 10:10 p.m, three terrorists in a white van mowed down pedestrians on the iconic bridge, then carried on to the market, where they left the vehicle and started attacking civilians with knives, she said.

All three appeared to be wearing explosive vests, but they were just costumes designed to spread “panic and fear.”

Cops arrived at the scene within minutes and shot the three dead, she said.