Kansas City, Mo. ? Police on Monday were hoping witnesses would come forward with information on who opened fire in a crowded banquet hall, killing one teenager and injuring three others.

“The murder squad is sitting by the phones hoping someone calls with something, anything. They have nothing at all. It’s sad. But hopefully someone will call today,” Officer Darin Snapp said Monday.

Kristi Carroll, 17, of Kansas City died Sunday at a hospital from wounds she received in the shooting, which occurred earlier Sunday. Carroll was a senior at Central High School scheduled to graduate in May.

Snapp said he hoped students at Central would discuss the shooting Monday and offer some information to police.

A 15-year-old girl, a 16-year-old boy and a 17-year-old boy, all from Kansas City, also were shot. Officials said their injuries were not life-threatening. Kansas City police did not release the surviving victims’ names because the shooter had not been arrested.

Investigators were checking sketchy reports that a gang rivalry may have sparked a fight that led to the shootings.

Detectives were not sure if any of the victims was an intended target.

Officers were called to the Troostwood Banquet Hall about 12:15 a.m. Sunday. When they arrived, hundreds of youths were spilling into the street from inside the hall. After the wounded were taken by ambulances to hospitals, investigators had a difficult time finding witnesses who admitted seeing the shooting.