article_snippet.sent: Young people pelted police with rocks on Monday in Baltimore following an online flier which circulated calling for a 'purge' - an apparent reference to a 2013 movie where all crime is legalized .
article_snippet.sent: Around 3pm on Tuesday, news cameras caught live scenes as dozens of students descended on Mondawmin Mall where they were greeted by lines of police officers, wearing riot gear, carrying shields and armed with pepper spray.
article_snippet.sent: Police were pelted with rocks, water bottles and anything that came to hand.
article_snippet.sent: According to Baltimore Police, cinder blocks were being thrown at fire trucks as they raced to extinguish the blazes and one protester was caught on camera sticking a knife into a hose.
article_snippet.sent: Balaclava-clad mobs were seen ripping the doors off one rifle shop and passing weapons to people on the streets.