What we know about the shooting at Six Flags Great America that left 3 people injured

Three people were shot and injured in the Six Flags Great America parking lot Sunday night in Gurnee, Illinois.

Visitors sheltered in place inside the park and then were ushered out by police and park staff.

The 300-acre theme park is located about 11 miles south of the Wisconsin-Illinois border and about 50 miles south of Milwaukee.

Here's what we know about the shooting.

What happened at Six Flags?

About 7:50 p.m., Gurnee police responded to reports of shots fired at Six Flags.

Police believe that a white sedan entered the parking lot and drove toward the front entrance of the park.

Then, suspects got out of the car and began shooting at another person in the parking lot, Gurnee police said.

The suspects then got back in the car and sped away.

Who was injured in the shooting?

Police said that three people suffered injuries that were not life-threatening.

A 17-year-old boy from Aurora, Illinois, suffered an upper thigh wound and a 19-year-old woman from Appleton suffered a lower leg wound.

Ambulances took them both to Advocate Condell Medical Center in Libertyville, Illinois.

Both were released from the hospital Sunday night.

A third victim, who was not identified by police, suffered a graze wound to the shoulder and declined to be taken to the hospital.

Was anyone arrested in the shooting?

As of Monday afternoon, Gurnee police had not arrested anyone in the shooting.

They asked anyone with information to call them at 847-599-7000, anonymously to Lake County Crime Stoppers at 847-662-222, online at lakecountycrimestoppers.com or using the the P3 Tips app.

Was there an active shooter?

While there were initial reports of an active shooter, Gurnee police said "this was not an active shooter incident inside the park."

"The shooting this evening was not a random act, and appeared to be a targeted incident that occurred outside the park," the police department said in a statement.

Were visitors evacuated from the park?

The shooting occurred about 10 minutes before the park was set to close at 8 p.m.

Many visitors sought shelter inside the park, hiding in buildings and other out-of-the-way areas. After some time, park security and police began clearing the park.

Videos posted to social media show crowds of people leaving Six Flags and walking into the parking lot, where dozens of law enforcement vehicles were parked.

What security measures does Six Flags have?

Six Flags prohibits guns and ammunition on its property, according to its website.

In a statement, a park representative said there are cameras inside the park and in the parking lot, uniformed and plain-clothes officers patrolling the property, and "advanced screening technology."

The Gurnee Police Department also operates a substation at the park. When the shooting occurred, the on-site officers and park security guards responded right away, the Six Flags representative said.

"We continue to review and enhance our protocol on a daily basis to ensure we are providing the highest level of safety," the statement read.

Did Six Flags reopen?

Six Flags reopened for its normal hours at 10:30 a.m. on Monday. It was set to close at 7 p.m.

Contact reporter Sophie Carson at (414) 223-5512 or scarson@gannett.com. Follow her on Twitter at @SCarson_News.