ISIS slaughters dozens of its own in hunt for spies - CBS News
'Absolute fear': What it's like in a university run by IS - BBC News
Islamic State's new execution method: Crushing prisoners to death
Islamic State executes Iraqi spies by dissolving them in nitric acid
ISIS commanders are fed alive to DOGS for failing their duties in new executions | Daily Mail Online
Isis: Executions by dissolving fighters in nitric acid part of paranoid hunt for western spies
ISIS executes its own fighters by plunging them in vats of ACID in vicious purge of 'spies' after US drones take out terror leaders – The Sun | The Sun
ISIS commanders are fed alive to DOGS for failing their duties in new executions | Daily Mail Online
ISIS jihadis drop their OWN fanatics into ACID in hunt for 'spies' | World | News | Express.co.uk