British authorities said Monday they had found no evidence that London terrorist Khalid Masood had any association with ISIS or al Qaeda — but he was clearly interested in jihad.

“His attack method appears to be based on low-sophistication, low-tech, low-cost techniques copied from other attacks, and echo the rhetoric of (ISIS) leaders in terms of methodology and attacking police and civilians,” counter-terror official Neil Basu said in a statement, Reuters reported.

Police also had no indication that 52-year-old Masood — who also went by the name Adrian Ajao — had discussed plans with others before the deadly attack that left four dead near Parliament, Balu said.

“There is no evidence that Masood was radicalized in prison in 2003, as has been suggested — this is pure speculation at this time. Whilst I have found no evidence of an association with IS or AQ, there is clearly an interest in jihad,” he said, referring to the terror groups.

The Metropolitan Police official made his announcement as Masood’s mother, Janet Ajao, released a statement saying: “I do not condone his [Masood’s] actions nor support the beliefs he held that led to him committing this atrocity.

“I am so deeply shocked, saddened and numbed by the actions my son has taken that have killed and injured innocent people in Westminster. Since discovering that it was my son that was responsible I have shed many tears for the people caught up in this horrendous incident,” she said, The Guardian reported.

The British-born jihadist had several previous convictions for offenses such as grievous bodily harm, including leaving a man with a gash on the face that required 20 stitches during a racially fueled fight that landed him in the slammer for two years. But he had never been convicted of any terrorism crimes, officials said.

Masood drove a rented car through a crowd of pedestrians on Westminster Bridge, killing three and injuring about 50. He then ran through the gates of Parliament and fatally stabbed a police constable before he was shot dead by police.

“I know when, where and how Masood committed his atrocities, but now I need to know why,” Balu said, appealing to anyone who may have had contact with him on the day of the attack to come forward.

The counter-terror official’s announcement came shortly after a British newspaper reported that Masood had been probed by domestic intelligence service MI5 as part of a plot to blow up a military base with a remote-controlled toy car.

He was investigated six years ago over alleged ties to four al Qaeda-inspired terrorists, the Telegraph reported.

In 2013, Zahid Iqbal, Mohammed Sharfaraz Ahmed, Syed Hussain and Umar Arshad were imprisoned for a total of 44 years after admitting planning to use a bomb-laden toy car to attack an army base in their hometown of Luton.

Masood — who lived near Ahmed — is believed to have come onto the radar of MI5 when he associated with the evildoers, whose vehicles were bugged, the paper reported.

In September 2011, authorities arrested the men during a raid just days before the 10th anniversary of 9/11. They were jailed in April 2013 after admitting having been inspired by al Qaeda.

Interior Minister Amber Rudd said Sunday that technology companies should cooperate more with law enforcement agencies and should stop providing “a secret place for terrorists to communicate” using encrypted messages.

Masood used the WhatsApp messaging service moments before the attack.

“There has been much speculation about who Masood was in contact with immediately prior to the attack,” Basu said. “All I will say on this point is that Masood’s communications that day are a main line of enquiry.”

Meanwhile, the family of murdered American tourist Kurt Cochran of Utah expressed gratitude Monday to first responders and people who sent donations and words of support.

Cochran and his wife, Melissa, were celebrating their 25th wedding anniversary when he was killed. She is recovering from broken bones and a head wound.

“Last night we were speaking as a family about all this, and it was unanimous that none of us harbor any ill will or harsh feelings towards this,” said Sarah McFarland, Melissa’s sister. “So we love our brother. We love what he brought to the world, and we feel like that this situation is going to bring many good things to the world.”

With Post wires