Updated: 2 officers, gunman dead in US courthouse shooting

Updated: 2 officers, gunman dead in US courthouse shooting

Three people have been killed in a shooting at a Michigan courthouse, including the suspect.

County Sheriff Paul Bailey said the gunman shot and killed two sworn-in law enforcement bailiffs and injured two other people, including a deputy sheriff, at a courthouse in Berrien county.

In a news conference following the shooting, Sheriff Bailey said the "suspect has been shot and killed".

Sheriff Bailey said the shooter was an inmate, who was being moved from a holding cell when he grabbed a gun from a deputy and opened fire.

Michigan Governor Rick Snyder said the scene had been secured by state police, and an investigation into the shooting will now get underway.

Photos and video from social media show the courthouse surrounded by police vehicles.

Michigan Department of Corrections spokesman Chris Gautz told the Washington Post one of their employees in a third-floor courtroom saw the gunman.

"We had a probation officer in the courtroom when it happened, and the gunman ran right past him and the rest of the folks," he said.

The courthouse has been closed for the rest of the day.