The London Bridge stabber acted alone, but he had links to a British Islamist activist who courted ties to ISIS, according to reports.

Pakistani native Usman Khan, 28, who was released from jail a year ago after serving just half of a 16-year sentence for plotting with eight others in 2010 to bomb London landmarks, was acting alone when he killed a man and a woman and wounded three other people, Metropolitan Police commissioner Dame Cressida Dick said Saturday.

The investigation is ongoing but no other suspects are being sought right now, she said.

“We must make 100 percent sure,” all leads are tracked down, she said. “Of course the investigation will continue, following all of the most pressing and obvious lines of inquiry.”

Khan reportedly had ties with Anjem Choudary, a British Islamist and a social and political activist convicted of inviting support from ISIS, Sky News reported. Two men linked to Choudary were named as the terrorists behind a similar attack on the London Bridge two years ago. He was also linked to the 2010 plot Khan was convicted for.

Dick brushed aside questions about whether the attack was an intelligence failure, given that it is the second attack there in as many years.

“This is not the time to be talking about that,” she said. “I’m focusing entirely on going forward and getting the investigation done and keeping London safe.”

“I’m sure there will be time for questions about who or if anyone knew anything about anything.”