Hundreds of youths stormed through downtown Chicago on Sunday, causing fear among motorists and pedestrians alike. The youths jumped onto the cars, shots were fired and tourists had to be rescued.

“Large groups of teens were seen blasting music from Bluetooth speakers and roaming in front of traffic, with some attempting to gain access to the city’s Millennium Park and the downtown Art Institute. The park is off-limits to those under 21 after certain hours, writes Fox News.

Some teens in the group started jumping up and down on cars, smashing windows and attacking people inside. One woman told Fox 32 her husband was attacked from the driver’s side of his vehicle and beaten after a group of teenagers jumped up and down on the couple’s windshield. The man was taken to a local hospital for treatment.

Police and SWAT teams attempted to restore order, but were not successful.

Police were seen escorting frightened members of public back to their cars or hotels to escape the chaos, and traffic on Chicago’s Michigan Avenue ground to a halt as police attempted to restore order.