Two people suspected of being involved in the shooting early Sunday morning were arrested and charged with murder, according to police.

The Amarillo Police Department announced it would hold a press conference Monday morning in the wake of the Sunday mass shooting that killed one person and injured eight others at a South Polk Street nightclub.

Amarillo police are investigating a shooting at a nightclub that left one person dead and nine others injured.

Police said the shooter exited the vehicle and opened fire into a crowd with a rifle before fleeing the scene.

People were gathered in the entrance to a nightclub in Amarillo when a vehicle pulled up at about 2:05 a.m. on Jan. 26 and a gunman exited the vehicle, opening fire into a large crowd with a rifle, the Amarillo Police Department said in a statement.

Amarillo Police say one man is dead, and nine others were injured in a shooting at a nightclub early Sunday morning. Investigators say the shooter, 23-year-old Robert Kenney Knox, of Amarillo, and the driver,

"The motive here is inexcusable. ... Ugly, impulsive violence and something that we should not accept as a community," Chief Birkenfeld said.

Three people were arrested following a mass shooting at a nightclub in the Texas Panhandle that police say might've stemmed from an earlier altercation