A UK supporter of ISIS was found guilty on Friday of trying to recruit children he was teaching into an“army” of jihadists to help carry out a wave of attacks across London, Reuters reported.

Umar Haque, 25, showed the children beheading videos and other violent militant propaganda, forced them to re-enact deadly attacks on the British capital and made them role-play attacking police officers.

“His plan was to create an army of children to assist with multiple terrorist attacks throughout London,” said Dean Haydon, head of the Metropolitan Police’s Counter Terrorism Command.“He tried and he did, we believe, radicalize vulnerable children from the ages of 11 to 14.”