Hamas leader Yahya Sinwar was tracked by an Israeli mini drone as he lay dying in the ruins of a building in southern Gaza and filmed him slumped in a chair covered in dust, according to video released by Israeli authorities, Reuters reports.

As the drone hovered nearby, the video showed him throwing a stick at it.

After an intensive manhunt that had lasted for more than a year, the Israeli troops that killed Sinwar were initially unaware that they had caught their country’s number one enemy after a gun battle on Wednesday, Israeli officials said.

Intelligence services had been gradually restricting the area where he could operate, the military said, after dental records, fingerprints and DNA testing provided final confirmation of Sinwar’s death.