CHICAGO (CBS) — An 18-year-old woman is dead and four other people were injured in a shooting in a market in the Grand Crossing neighborhood on Monday evening, police said.

A few minutes after 5 p.m., two men and a woman came up to the market at 79th Street and Avalon Avenue, peered into the market, saw who was inside, and then opened fire, Interim Chicago Police Supt. Charlie Beck said at the scene.

An 18-year-old woman died at the University of Chicago Hospital after being shot in the neck, police said.

Two other teenage girls — ages 17 and 18 — were reported in serious to critical condition at the same hospital. They suffered gunshots to the arm, chest, and ankle; and to the back, respectively.

A 19-year-old man was taken to Northwestern Memorial Hospital with a gunshot wound to the leg, and his condition was stabilized. A 63-year-old man was stabilized with a gunshot wound to the leg at the U of C Medical Center.

A total of 20 rounds were fired into the store between the three suspects. After the shooting, the suspects fled the scene in a light-colored car, Beck said.

Police as of 7 p.m. had not determined a motive.

Meanwhile, another person was reportedly found shot at 78th Street and Woodlawn Avenue, but despite being a block away, that incident was not believed to be connected, Beck said.

Community activist Andrew Holmes is asking that anyone in the vicinity who may have surveillance video from their home or business to please provide it to the police.