Police in Denver are investigating a string of shootings that left four people dead.

The first happened early Sunday outside an apartment complex in the Lowry neighborhood. One person died at the scene and a second died at the hospital.

Police were already at the complex, responding to a call about a loud party in one of the upstairs units. It's not clear if the shooting is connected to the party.

The names of the victims have not been released.

No arrests have been made and police have not released a suspect description.

By Monday morning police had responded to three more shootings.

At approximately 9:30 pm Sunday a man was taken to the hospital after a shooting near Pontiac Street and Martin Luther King Jr. Blvd. but did not survive his injuries.

The victim's name has not been released and there is no suspect description.

Early Monday a man was shot and killed on the 2400 block of Race Street. Police say they have a suspect in custody.

The third shooting left one person injured. The victim is in stable condition.

Breaking: Shooting at 6700 Blk of E Cedar Ave 2 victims, one fatal one transported. No suspect info. We will update as info is available. — Denver Police Dept. (@DenverPolice) March 15, 2015