A sheriff says four inmates have overpowered two corrections officers with a homemade weapon and escaped from a county jail in Ohio.

The Gallia County Sheriff's Office said the four men forced open a secured door at the Gallia County Jail in Gallipolis, along the Ohio River in southeast Ohio, early Sunday.

Ohio authorities have identified the inmates as 24-year-old Christopher Clemente, 40-year-old Brynn Martin, 30-year-old Troy McDaniel Jr and 29-year-old Lawrence Lee III.

Ohio authorities have identified two of the inmates as 24-year-old Christopher Clemente (right) and 40-year-old Brynn Martin (left)

Police said 30-year-old Troy McDaniel Jr (left) and 29-year-old Lawrence Lee III (right) also escaped the jail on Sunday

Police said they had help from at least one person outside the jail.

Pennsylvania authorities say the Westmoreland Mall outside Greensburg, Pennsylvania, was evacuated Sunday afternoon after police believed Clemente was in that vicinity. The mall has since reopened.

Authorities said the four male inmates overpowered two female corrections officers around 12.15am Sunday morning.

The corrections officers were not seriously injured during the incident.

Sheriff Matt Champlin said in a press conference that one of the inmates, Martin, has escaped from the jail before.

Champlin said the four men gained access to the administrative wing of the jail and stole the keys to a car belonging to one of the corrections officers.

The Gallia County Sheriff's Office said the four men forced open a secured door at the Gallia County Jail (pictured) in Gallipolis, along the Ohio River in southeast Ohio, early Sunday

They then drove the vehicle about a block away where another car was waiting on them.

All of the inmates should be considered extremely dangerous.

Martin is described as being 5-foot-7 and weighing about 170lbs. He has brown hair and blue eyes.

Authorities said Clemente is 6-foot-1 and weighs around 165lbs. Clemente has brown hair and hazel eyes.

McDaniel is 5-foot-11 and weighs 157lbs. He has blonde hair and blue eyes.

Lee is described as being 5-foot-9 and weighing about 187lbs. He has brown hair and brown eyes.

US Marshals are offering up to $2,500 per inmate for any information leading to their apprehension. Anyone with information is encouraged to call the Gallia County Sheriff's Office tip line at 740-446-655.