VINITA, Okla. (AP) — An inmate who had escaped from an Oklahoma prison was back in custody Sunday, officials announced.

Jett Green, 23, had walked away from the Northeast Oklahoma Correctional Center in Vinita at around 9 p.m. Saturday, according to the Oklahoma Department of Corrections. Vinita is about 60 miles (97 km) northeast of Tulsa.

State prison officials announced Sunday afternoon that Green had been apprehended. The prison agency did not immediately provide information on how Green had been able to escape or how he was later captured.

Green is serving a two-year sentence for possession of a stolen vehicle out of Tulsa County.