A shooting at a courthouse in the northern US state of Michigan on Monday left two court security officers and the suspected shooter dead, the sheriff said, according to news reports.
Sheriff Paul Bailey told news media at a press conference that several civilians were also wounded in the shooting at Berrien County Courthouse in the south-western Michigan town of St Joseph.
Police have "secured the scene" at the courthouse and had begun an investigation, Michigan Governor Rick Snyder said on Twitter.
A local official told television broadcaster ABC 57 that a man on his way to jail took a gun from a sheriff's deputy and opened fire.
Bailey did not confirm the account, saying only that investigators did not yet have all the details about what happened.
The shooting comes amid heightened tensions in the United States after a sniper shot 14 people, killing five police officers in Dallas Thursday night at a rally to protest police violence against blacks.