Chicago police arrested 11 young people after one of them beat a man on the Near North Side as the others "egged" him on, authorities said.



The attack happened about 11:20 p.m. Wednesday in the 700 block of North Dearborn Street, police said.



According to police they observed a large group of teens causing a disturbance near Chicago Avenue and Dearborn Street, police said. At that time, a 15-year-old boy, punched a 21-year-old man "for no reason as the rest of the teens egged him on," Chicago Police officials said in a press release.



The man fell to the ground and struck his head and then the group attempted to flee as police began pursuing the group on foot, police said.



The 15-year-old boy was arrested a short time later but tried to resist arrest and struck several police officers with closed fists and kicks, police said.



The 15-year-old was charged as a juvenile with felony aggravated battery, two felony counts of aggravated battery to a police officer and three felony counts of resisting arrest.



In addition, Darnell D. Johnson 18, of the 11000 block of South Esmond Street was charged with a misdemeanor count of mob action and violence to a person or property. The other juveniles, who were also charged with misdemeanors, ranged in age from 14 to 17, police said.