A convicted murderer is on the loose after escaping from a work-release facility in Alabama, officials said.

Daniel Miner, 43, was reported missing from his bed on Saturday night during a count of inmates at the state-run facility in the town of Alpine, about 40 miles southeast of Birmingham, according to the Alabama Department of Corrections. It's unclear how the inmate escaped.

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Miner is serving a life sentence without the possibility of parole after being convicted of murder in Marshall County in 1994. He was also sentenced on a promoting prison contraband charge in Limestone County in 2003, according to inmate records.

The Marshall County Sheriff's Office said it is working with state authorities to locate the escaped inmate.