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Man Killed, Teen Wounded in Shooting at Phoenix Halloween Party

Police said confusion and panic at the scene had hampered the investigation, and no arrests had been made Sunday night.

A man was killed and a teenager was injured when gunfire erupted at a large Halloween party Sunday in Phoenix, police said.

The shooting occurred during a fight about 4 a.m. (6 a.m. ET) as more than 400 people were gathered in a vacant lot near Fowler Elementary School, police said.

No arrests had been made Sunday night. Police said confusion and panic at the scene had hampered the investigation.

"I would assume a lot of people don't know what actually happened because they either see a fight occurring or shots being fired and they're scared and they run," Phoenix police Sgt. Eric Lumley said. "I think it was chaotic for the first officers to arrive, and they probably couldn't secure the scene as well as they desired.

"People were fleeing right and left," Lumley said.

A 24-year-old was pronounced dead at the scene. A teenager with non-life-threatening gunshot injuries to his lower body was being treated Sunday night at a hospital.

"I was trying to tell them on the mike, 'Hey, guys, stop it,'" Adrian Escobar, whose 17-member Mexican band was performing when the fight broke out, told NBC station KPNX of Phoenix.

"No one could hear me over the crowd and the commotion," Escobar said. "Then someone fired a shot, first in the air, and everyone started running, and we hid."

Escobar said the party was hosted by a neighborhood "truck club," an organization that holds shows featuring retrofitted and restored trucks.