Colorado authorities are looking for two members of the white supremacist prison gang known as the 211 Crew in connection with the killing of state prisons chief Tom Clements.

El Paso County Sheriff's Office identified the two men as James Lohr, 47, and Thomas Guolee, 31. One or both could be headed toward Nevada, the office said.

"They are both known associates of the 211 Crew," said Sheriff's Lt. Jeff Kramer. "They are believed to be armed and dangerous."

Clements was widely recognized for cracking down on prison gangs, including the 211 Crew. He was shot at his home by former gang member Evan Ebel, who was out of prison on parole.