In what seems like a story written by an unimaginative Hollywood screenwriter, a British special forces sniper rescued an eight-year-old boy and his father from the knife of an Islamic State executioner by knocking off the terrorist with a rifle shot from more than ten football fields away.

The hero marksman then downed two of the other ISIS militants who were taking part in the gruesome murders.

The two innocent victims subscribed to the Shia sect of Islam and thus were deemed infidels by the crazed group and not fit to live. They were just seconds from realizing that cruel fate before the ace British military shooter acted after being tipped off by an Iraqi spy.

British special forces (SAS) have been conducting “covert patrols” over the past few months in the area. This particular event took place on the Syrian border near Turkey.

Here’s precisely how the rescue operation went down, according to the UK’s Express:

The crack team considered calling in an air strike using a Reaper Drone, but the elite troops feared many of the innocent civilians who had been forced to watch the executions might also be killed.

Instead the SAS unit decided on a risky long-range kill using the team’s sniper.

Speaking to the Daily Star Sunday, one source said: “There were several decapitated bodies already lying on the ground.

“Through binoculars the soldiers could see that the crowd were terrified and many were in tears.”

A man and a young boy were dragged out in front of the crowd and were made to kneel down.

“They were both wearing blindfolds and looked terrified.

“A tall bearded man emerged and drew a long knife.

“He began addressing the crowd and slapping the father and his son around the head and kicking them on to the floor.

“Standing either side of the executioner were two other Isis fighters, both armed with AK47s.”

The SAS marksman, using a .50 calibre sniper rifle fitted with a silencer, killed the executioner just in time.

The source added: “The ISIS thug who was about to decapitate the father was shot in the head and collapsed.