PESHAWAR (Web Desk) – The mastermind of the massacre of Army Public school (APS) in Peshawar that left over 140 schoolchildren died in 2014 has been killed in a drone strike in Afghanistan, a security official stated.

The official claimed Umar Mansoor was killed along with Qari Saifullah, in the strike in the Afghanistan’s Nangarhar Province on Saturday.

The massacre on December 16, 2014, left 144 students and staff members dead after seven gunmen of the banned Tehrik-e-Taliban Pakistan (TTP) stormed the Army Public School.

The US State Department, on May 25, designated Umar Mansour as a global terrorist.

There was no confirmation of Mansour’s death from the TTP.