A portion of South DuSable Lake Shore Drive was closed Monday night after large crowds caused a heavy police presence in Jackson Park.
Traffic was closed around 9 p.m. on Lake Shore Drive at 57th Street, Chicago police said.
Around 1,000 people were seen gathered in the area, some jumping on top of cars. A few people in the crowd were seen throwing objects, and others charged toward a line of police officers.
No arrests were reported. The crowd size had dwindled by 10 p.m.
On Friday, University of Chicago Police issued an alert about a possible “teen takeover” gathering that had been planned for Monday night near 57th Street Beach.
Officers also were on scene of another large crowd gathered Monday night at North Avenue Beach, police said.
Chicago police did not have any further information.
On Sunday, another “unauthorized large gathering” apparently involving teens that ended with a driver veering into five Chicago police officers, injuring them, as they were dispersing the crowd on the Near West Side.
An 18-year-old man was charged with attempted murder in that incident.
“I continue to call on parents and guardians to know where their children are and to help ensure they are safe and accounted for,” Mayor Brandon Johnson said after Sunday’s early-morning incident.