ANTIOCH (KPIX 5) — A 16-year-old has been arrested in an Antioch shooting during an “illegal drug transaction” that left a teenage girl dead and a teenage boy wounded, authorities said early Thursday.

In an early Thursday morning news release, Antioch police Sgt. James Stenger said a 16-year-old boy was arrested in Oakley on Wednesday. Investigators have determined, Stenger said, that the fatal shooting came during “an illegal drug transaction.”

A bullet hole shattered the front windshield of the vehicle that two teens — a 17-year-old girl and a 17-year-old boy, both thought to be from neighboring Oakley — were sitting in at around 7 p.m. Monday evening at the end of La Jolla Drive.

Antioch shooting investigation

Antioch shooting investigation (CBS)

Police said the teens drove themselves to a nearby hospital suffering from at least one gunshot wound each, according to police. The young girl was pronounced dead in the emergency room. The boy suffered non-life threatening injuries.

“I heard it. It was like fireworks or firecrackers – Pop! Pop! Pop! Pop! — Like that,” said one neighbor, who did not want to be identified with the shooter still at large.

She said police officers started banging on her front door to warn her. The shooter, described by police only as a male suspect, took off on foot, hopping over backyard fences.

Area resident James McGee said he heard about the commotion, but couldn’t believe it was in his neighborhood.

“I’ve lived here about a year and it’s a quiet area,” said McGee. “Kinda shocked. Usually its pretty quiet here. Nice neighborhood.”

One thing that was noticeable in the area where the shooting happened were warning signs stating that the neighborhood is under video surveillance.

.Anyone with information on the case is asked to call police at (925) 778-2441 or Detective Adrian Gonzalez at (925) 779-6923. Tipsters can also text-a-tip to 274637 (CR

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