"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

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.