EAST RUTHERFORD -- Police made 34 arrests Sunday at the Hot 97 Summer Jam concert, New Jersey State Police said Monday.

Some 50,000 people attended the event at MetLife Stadium, police said.

Those arrested face a range of charges, including trespassing, possession of marijuana, and assault.

Police said eight people were issued summonses for soliciting without a permit and they left the venue.

The event also had a couple points of chaos, including when the gates closed on fans.

After the gates had been open for three hours, they were closed after a few fans in the security line "caused a disturbance by not following entry protocol," state police said.

The gates were eventually reopened and fans could enter.

During the concert, a car reportedly caught on fire and flames spread to two other vehicles. Additionally, a woman passed out from the 90-degree heat.

Hot 97's spokesperson had no comment.

Last year, 35 people were arrested at Summer Jam while 61 people were arrested in 2015.

Sara Jerde may be reached at sjerde@njadvancemedia.com. Follow her on Twitter @SaraJerde.

Bobby Olivier may be reached at bolivier@njadvancemedia.com. Follow him on Twitter @BobbyOlivier and Facebook. Find NJ.com on Facebook.