LONDON — A man recently released from prison after serving time for terrorism-related offenses strapped on a fake bomb and stabbed two people on a busy London street Sunday before being shot to death by police, officials said.

Deputy Assistant Commissioner Lucy D’Orsi said police identified the attacker as 20-year-old Sudesh Amman.

He had been convicted of publishing graphic terrorist videos online and had stockpiled instructions on bomb making and knife attacks, according to police.

Officers had been trailing Amman at the time of Sunday’s attack, D’Orsi said, but were unable to head off the bloodshed in the commercial and residential south London neighborhood of Streatham, where Amman struck outside a major pharmacy on a busy shopping afternoon.

“The suspect had been recently released from prison where he had been serving a sentence for Islamist-related terrorism offenses,” D’Orsi said of the attacker.

It seems likely the victims will survive Sunday’s attack.