Authorities are searching for an inmate who walked away from the Federal Correctional Complex in Lompoc on Thursday.

Marcos Castaneda, 44, was found to be missing from the minimum-security satellite camp adjacent to the prison complex at about 9:30 a.m., according to Celeste Lancaster, public information officer.

Castaneda was sentenced in the Western District of Wisconsin to a 20-year term for conspiracy to possess with intent to distribute 500 grams or more of methamphetamine, Lancaster said.

He was described as Hispanic, 6-foot-1 and 280 pounds, with black hair and brown eyes.

Anyone with information about Castaneda or his whereabouts is asked to contact the U.S. Marshals Service at 805.346.2728.

Inmates from minimum-security federal prison camps are considered walkaways because they don’t reside within razor-wire-topped fencing, and they typically perform chores on prison grounds, only reporting to designated areas at certain times.

The Satellite Prison Camp at the Lompoc site involves two minimum-security facilities housing approximately 300 male offenders.

The Lompoc Federal Correctional Complex includes the low-security Federal Correctional Institution II (formerly known as a U.S. Penitentiary) with 1,960 inmates.

The complex also is home to the Federal Correctional Institution, now nicknamed FCI I with 909 low-security inmates.