MINNEAPOLIS — The Hennepin County Sheriff's Office is looking for a 46-year-old inmate who escaped police custody Sunday afternoon.

Billy Mason was being prepared for transport with other inmates just before 2 p.m. at the county's public safety facility on Fourth Avenue South in Minneapolis when he escaped through an open security garage door, authorities say. 

Mason is described by the sheriff's office as 5 feet 10 inches tall, 249 pounds, with brown hair and brown eyes. He was last seen wearing a black t-shirt, blue jeans and black shoes, and was handcuffed with a waistbelt when he escaped.

Anyone who might know where he is is asked to call 911. 

Authorities say Mason had been conditionally released on a Hennepin County warrant, but was being transported for a warrant out of Ramsey County. 

Court documents in Ramsey County show Mason is charged with taking and driving a motor vehicle without the owner's consent.