British suicide bomber Salman Abedi, who killed 22 people at an Ariana Grande concert in Manchester last year, was rescued by the Royal Navy from the civil war in Libya three years before the massacre, according to a new report.

Abedi, who was born to Libyan parents, was believed to have been on holiday in that country in August 2014 when fighting broke out and British officials offered to evacuate UK citizens, the Daily Mail reported.

Abedi and his younger brother Hashem were among 110 British citizens picked up from the Libyan coast and evacuated on the HMS Enterprise to Malta for a flight home to Britain at the time, the paper reported.

On May 22, 2017, the then-22-year-old blew himself up outside Manchester Arena in northwest England at the end of Grande’s concert.

Seven children were among those killed. More than 800 concertgoers were left “with physical and deep psychological injuries,” authorities have said.

The attack was the deadliest of five militant strikes in Britain last year that killed a total of 36 people.

“For this man to have committed such an atrocity on UK soil after we rescued him from Libya was an act of utter betrayal,” a government source told the paper.

Security sources quoted by the paper said Abedi was not believed to have been radicalized at the time of his rescue.

According to an official review of the bombing published in December, Abedi had been monitored by British intelligence agency MI5 between January and July 2014.

It was deemed to be a case of mistaken identity.

“The Anderson review into the Manchester attack concluded that the investigative actions taken in relation to Salman Abedi in 2014, and the subsequent decision to close him as a subject of interest, were sound on the basis of the information available at the time,” a government spokesman said, AFP reported.

But the review found that MI5 had come across intelligence in the months before the attack which, “had its true significance been properly understood,” would have caused a new probe to be launched.

Hashem remains jailed in Libya after British requests for his extradition have been denied.

At the time of the evacuation, Abedi was taking a gap year from Manchester College and was vacationing in Libya, where he had visited regularly after his parents, Ramadan and Samia, returned to their home country during the 2011 revolution in which Muammar Gaddafi was ousted and killed.

Last year, the Wall Street Journal cited a family friend saying that Abedi had gone to Libya with his dad in 2011 to join the Tripoli Brigade militia as it battled the dictator’s regime.

The revelation about Abedi’s rescue is likely to infuriate the families whose relatives were killed in the attack, and raises additional fears over possible intelligence blunders.

With Post wires