“Jihadi John” the ISIS terrorist who oversaw the brutal executions of American and Western hostages, was believed to have been killed after he was hit by a U.S. air strike on Thursday night, officials said.

One official said the jihadist, Mohammed Emwazi, was thought to be hit as he left a building in Raqqa, Syria, and entered a vehicle.

The official also described it as a “flawless” and “clean hit” with no collateral damage and that Emwazi basically “evaporated.”

Pentagon Press Secretary Peter Cook said:

    “U.S. forces conducted an airstrike in Raqqa, Syria, on Nov. 12, 2015 targeting Mohamed Emwazi, also known as ‘Jihadi John,”
    “Emwazi, a British citizen, participated in the videos showing the murders of U.S. journalists Steven Sotloff and James Foley, U.S. aid worker Abdul-Rahman Kassig, British aid workers David Haines and Alan Henning, Japanese journalist Kenji Goto, and a number of other hostages,” Cook said.
    “We are assessing the results of tonight’s operation and will provide additional information as and where appropriate.”

A senior US defence official told CNN that they knew it was Emwazi before they struck in a mission he described as involving ‘persistent surveillance’.