'Neighbourhood beef' behind latest mass shooting in the US

The scene the next morning. Photo credit: APTN

An all-night arts and music festival in New Jersey turned deadly Sunday morning when gunfire erupted in a crowd, sending people stampeding and leaving one suspect dead and 22 people injured, authorities said.

Gennie Darisme was at the Art All Night Trenton festival when the shooting occurred, getting ready to leave around 2:45am when she heard shots and saw people running.

"There were people trampling other people, cars hitting other cars," she said.

When she was walking back to her car after the shots ceased, Ms Darisme said she saw someone bleeding on the ground, in handcuffs.

Seventeen people were treated for gunshot wounds, said Mercer County prosecutor Angelo Onofri. Four of those, including a 13-year-old boy, remain in critical condition late Sunday morning.

One of the suspects, a 33-year-old man, was killed, authorities said. Mr Onofri said he believes police killed him. Another suspect is in custody.

Mr Onofri said a "neighbourhood beef" was behind the shooting inside the historic Roebling Wire Works Building.

APTN / Newshub.