A US is 99.9% sure that a months’ long planned drone strike in Syria has killed ISIS executioner “Jihadi John”. Born Mohammed Emwazi, “Jihadi John” was a British Arab man alleged to be the person seen in several videos produced by the Islamic extremist group ISIL showing the beheadings of a number of captives in 2014 and 2015. A group of his hostages nicknamed him “Jihadi John” since he was part of a four-person terrorist cell with British accents whom they called “The Beatles”.

Emwazi or Jihadi John, is believed to be responsible for the killings of James Foley, Steven Sotloff, David Haines, Alan Henning, Peter Kassig, Haruna Yukawa, Kenji Goto as well as many Syrian soldiers. An ISIS video confirming Kassig’s killing was followed by the gruesome killing of 21 Syrian soldiers.

He was the only one of the four Islamic State Britons dubbed “The Beatles” allowed to wear Western clothes in the terror group’s heartlands. Emwazi, frequently seen in baseball hats in England, had acquired a New York Yankees cap in IS stronghold Raqqa. It was the Yankees cap that he always wore that allowed a Syrian agent planted in the town to track his movements.

The end to “Jihaid John’s” reign of terror came after a joint US-UK covert operation lasting several months and described by one intelligence source as the “closest the CIA and MI6 have worked together in almost 30 years”. Authorities had been monitoring Emwazi, a British citizen, for a few days as he visited family in Raqqa and spent time at an ISIS media-operations center.

A British drone and two MQ-9 Reaper drones owned by the US had been following Emwazi, 27, for most of the day as he met with people around the ISIS-held Syrian city of Raqqa. At 11:40 p.m., drone operators thousands of miles away at Creech Air Force Base in Indian Springs, Nev., were given a green light as Emwazi got in a car at the Islamic courts.

A US official said once they had strong confirmation that Emwazi was getting into the vehicle, they released two Hellfire missiles. They received photographic evidence that the car was evaporated. The attack lasted only seconds and took place near a clock tower that has been the site of numerous ISIS executions, said an anti-ISIS activist group in Raqqa.

The car carrying Emwazi took a direct hit and he and three other foreign terrorists were killed instantly. While the strike itself was fairly routine, it is significant because Emwazi was an ISIS “celebrity” after appearing in the videos beheading American and British hostages.