Abu Osama Al-masri

He was still a teenager when he wandered into one of the buildings at the dusty hilltop complex, looking for the cages where rabbits were kept. Inside, he found a crudely equipped laboratory, with test tubes, protective masks and rows of black jars.

Abu Osama al-Masri, an Egyptian cleric and the frontman of an ISIS-offshoot group, has been unmasked as the suspected mastermind behind the alleged downing of a Russian jet, according to a media report.

He was still a teenager when he wandered into one of the buildings at the dusty hilltop complex, looking for the cages where rabbits were kept. Inside, he found a crudely equipped laboratory, with test tubes, protective masks and rows of black jars.

Abu Osama al-Masri, an Egyptian cleric and the frontman of an ISIS-offshoot group, has been unmasked as the suspected mastermind behind the alleged downing of a Russian jet, according to a media report.