Shocking video from Thursday’s deadly terror attack at a UK synagogue shows a cop frantically yelling at horrified onlookers to “go away” because the deranged suspect “has a bomb.”

Two people were killed after a madman rammed his car into a crowd outside the Heaton Park synagogue in Manchester before stabbing multiple worshippers who were marking Yom Kippur, the holiest day of the year in Judaism.

In one video from the terrifying incident, a police officer is seen saying, “Everybody else, if you’re not involved, move back. Get away, somebody stay with the casualties. Everybody else, he has a bomb, go away.”

A bystander then says, “He’s got a bomb on him. He’s going to blow himself up, he’s trying to press the button,” according to a graphic video shared on social media.

Images later showed the suspected attacker — a bald-headed man with a beard and dark clothing — with white objects seemingly strapped around his waist close to the synagogue’s perimeter fence, BBC News reported.

A controlled explosion was later heard after the bomb disposal unit was deployed to the scene of the attack.

The unidentified attacker was shot dead by police who arrived minutes after the horror unfolded at the synagogue just after 9:30 a.m.

The attack took place just after morning prayers had started at the synagogue in Crumpsall, a multiethnic area in the north of Manchester.

One eyewitness, a delivery driver named Gareth, said he was driving past the synagogue when the attack unfolded. 

Held in traffic, he assumed there had been a “normal collision” until he got closer and saw a man “bleeding out on the floor,” he told BBC Radio Manchester.

He then described seeing another man “laying on the floor” in front of a car, as onlookers were shouting.

Gareth said he saw the attacker holding a knife and “stabbing the window” of a nearby building “trying to get in,” he told BBC Radio Manchester.

“Within seconds, the police arrived, they gave him a couple of warnings, he didn’t listen, so they opened fire,” he said, describing how the attacker fell to the floor before he “started getting back up and they [the police] shot him again.”

Thursday’s attack is being investigated as a “marauding terrorist attack,” and hospitals across Manchester are on lockdown.

A police cordon remained in place at the scene on Thursday afternoon as members of the Jewish community gathered nearby, awaiting information.

Police and ambulance workers wearing helmets and stab proof vests were later seen at the synagogue.

Four other people were injured in the attack, and three of them remain in a serious condition, police confirmed.

Later on Thursday, two men were seen being led away in handcuffs from a street close to the synagogue, according to a neighbor.

“They’ve arrested two people on our road. They’ve closed the road, and there’s a police helicopter just over us. There were six or seven police cars with armed police,” the neighbor told the PA news agency.

A group of Jewish men told the BBC they have been really scared of an attack like this happening.

British Prime Minister Keir Starmer condemned the attack, calling it “all the more horrific” for having taken place on Yom Kippur.

The PM said “additional police assets” will be deployed at synagogues across the country following the attack, as he cut short a visit to Denmark to return to the UK.

“We will do everything to keep our Jewish community safe,” he said.