A spokeswoman for the U.S. attorney in Utah says a shooting has left at least one person injured at a federal courthouse in downtown Salt Lake City.

Salt Lake City police were called to the U.S. District Court building about 9:45 a.m. Monday, and witnesses told the Salt Lake Tribune they saw someone carried out of the courthouse on a stretcher.

U.S. attorney's office spokeswoman Melodie Rydalch said the shooting happened in connection with a gang-related trial.

Rydalch didn't immediately say if the shooter was in custody.

The case was being heard in U.S. District Judge Tena Campbell's courtroom. The courthouse was placed on immediate lock down, KUTV reports. 

-- The Associated Press