ISIS has claimed responsibility for the stabbing rampage in London that left two dead and three seriously injured.

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The terrorist organization said through its Amaq news agency that Usman Khan, 28, a convicted terrorist out on Britain's equivalent of parole, had acted Friday on its behalf, the New York Post reported.

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The group did not provide any specific evidence that the attack was done at its direction, but said it was carried out in response to its calls to target countries that have been part of a coalition fighting the jihadist group.

"The person who carried out the London attack… was a fighter from the Islamic State, and did so in response to calls to target citizens of coalition countries," ISIS said, referring to a multi-country alliance against the group.

Metropolitan Police commissioner Dame Cressida Dick said Saturday they believed Khan acted alone.

Among those killed was Jack Merritt, 25, a course coordinator with the group that was hosting a prison rehabilitation conference that Khan was attending when he stole two knives and started stabbing people. A woman at the conference, who has not yet been publicly identified, was also killed. Three additional people are hospitalized with wounds from the attack, including one man who is in a coma and another person in the intensive care unit at a London hospital.