Roving groups of teenage vandals wreaked havoc across the Hyde Park neighborhood on Halloween night, getting into fistfights, throwing eggs and golf balls and even setting at least two cars on fire, according to Chicago police. No injuries were reported during the roughly three-hour spree, which coincided with Halloween events in the area meant to draw young people. During the first wave of trouble, police said a large group was seen throwing eggs, golf balls and punches at a Halloween event near Hyde Park’s commercial strip in the 5300 block of South Lake Park Avenue just after 7:15 p.m.

Police arrested 11 juveniles and an adult and later cited them for public peace violation after they refused orders to disperse, authorities said in a statement.