09/13/2011 03:21 pm ET Updated Dec 06, 2017

Byron Boys Ranch Escape: Four Teens Missing From Juvenile Rehabilitation Facility (VIDEO)

On Monday, four teenage boys escaped from the Orin Allen Youth Rehabilitation Facility, formerly known as the Byron Boys Ranch, in Byron. According to the Sacramento Bee, all four are still missing.

At about 8:30pm, authorities were called to the minimum-security facility when it was discovered that one of the boys was missing. By the time they arrived, three others were missing as well. The facility is not locked or fenced, as it houses only low-level delinquent youths who usually have not committed serious crimes.

Authorities are especially concerned about one teen who is mentally disabled. The teen is a 15-year-old black male, and is 6'3" and 300 pounds. The second teen is a 14-year-old Latino male who is 5' and 110 pounds; the third is a 15-year-old black male who is 6'4" and 170 pounds; and the fourth is a 14-year-old Latino male who is 5' and 125 pounds, according to Mercury News.

According to ABC7, one teen called his mother and told her that he had cut his hand, and that he was in Brentwood, but did not specify where. Police were unable to trace the call.

The Contra Costa Sheriff's Office has been searching with police dogs since Monday night. Residents were originally told to stay indoors with doors locked, but that advisory was lifted at 5am on Tuesday morning.

Check out theABC7 video from the scene below: