security scare

They said they had received an anonymous threat, two days after the killing of five police officers.

A nearby parking lot was searched for a "suspicious person" but no-one was found. SWAT officers were earlier deployed at the main building.

On Thursday, five white police officers were shot dead by a black man, Micah Johnson, during a protest rally.

The march was against the killing of black men by police. Two deaths this week have led to nationwide protests.

Hundreds of people had to vacate their offices after this morning's threat at the court, with a police cordon put around the block.

The police searched the building with bomb squad dogs looking for a suspect bag until an all-clear was given. No suspicious items were found, they said.