PROVO — Provo police say they have interviewed "key players" connected to the fatal shooting of a 24-year-old man Monday night.

Provo police were called just before midnight to Utah Valley Hospital where a 20-year-old woman had driven her injured boyfriend to the emergency room. The man, later identified as Gustavo Ramirez, was pronounced dead on arrival, said Provo Police Sgt. Brian Taylor.

Investigators retracing the couple's steps discovered there was a shooting at Ramirez's home in the 100 North block of 400 West. Shots were fired both inside and outside the house, Taylor said.

Based on evidence collected at the scene, Taylor said investigators believe one gun was fired multiple times.

"We are at the point now where detectives have identified ... all the key players," he said. "(They are) now in the process of conducting interviews with those people. ... We are interviewing a suspect now."

That person has not been arrested as of early Tuesday evening, according to Taylor.

It was not immediately known who owned the house or how many people were inside when the shooting occurred. Taylor said "police were familiar with the house," noting that officers had been called there before.

Detectives also searched the neighborhood looking for evidence, including possible surveillance video from nearby businesses.

The lieutenant didn't have information about the circumstances that led to the shooting or a possible motive. He confirmed the public was not considered at risk Tuesday evening.