Law enforcement officials searching for an Army veteran accused of killing at least four people in Montana Friday morning have located the white Ford F-150 allegedly used by the man to flee, though he has not yet been located.

The Anaconda-Deer Lodge County Law Enforcement Center identified the shooting suspect as 45-year-old Michael Paul Brown of Anaconda and said Friday he is believed to be armed and dangerous.

Brown was last seen in the Stumptown area, which is west of Anaconda, the law enforcement center said.

Authorities released a photo of Brown Saturday, showing him barefoot and shirtless walking down what appeared to be a flight of outdoor concrete steps.

Law enforcement personnel respond to a reported shooting in Anaconda, Mont., Friday.  (Joseph Scheller/The Montana Standard via AP)

With no sign of the Army veteran in the white pickup or his home, authorities converged on the Stumptown Road area west of Anaconda by ground and air Friday, locking it down so no one was allowed in or out. Authorities had lifted the lockdown by Saturday.

DCI warned residents that if they see Brown not to approach him. Instead, residents are encouraged to call 911 immediately. He has been described as 5-foot-10 and about 170 pounds, with blue eyes and brown hair.

While authorities have identified all four victims in Friday’s shooting, names will not be released until all family members have been notified, and as DCI said, when “the time is appropriate.”

Brown was an armor crewman in the Army from January 2001 to May 2005 and served in the National Guard from April 2006 to March 2008, Army Public Affairs confirmed to Fox News Digital. He deployed to Iraq from February 2004 to March 2005 and left the service with the rank of sergeant.

He also served as an armor crewman in the Montana National Guard from April 2006 to March 2009, officials said.

Fox News Digital’s Alexandra Koch and The Associated Press contributed to this report.