ISIS claims that it has executed five men accused of working for the army against the militant group in the Sinai Peninsula, the SITE intelligence group said.

The terrorist group has published a series of photos on the secure messaging app Telegram, in which five men presented as army elements are seen lying face down on the ground, and then a militant shoots them in the back of their heads with an assault rifle.

The terrorist group has killed hundreds of police officers and soldiers since the military overthrow of President Mohamed Mursi in 2013 caused a severe crackdown on his supporters.

The crackdown has killed hundreds of Mursi’s followers and set off a militant insurgency that has claimed hundreds of security personnel.

In October 2015, ISIS claimed the downing of a plane carrying Russian tourists from the Sinai resort of Sharm el-Sheikh to Russia. The incident killed all 224 people on board.

ISIS is a terrorist organization that is now believed to be operating in 18 countries across the world, including Iraq, Syria, Afghanistan and Pakistan. It also has branches in Mali, Somalia, Bangladesh, and the Philippines.

The militant group gained power in Iraq and Syrian in 2014.