Hammond police assisted with an FBI raid Saturday evening in the Indiana city, but federal officials would not release any details.
Hammond officials did not know the circumstances surrounding the raid, which began about 7 p.m. and lasted two hours, said a police dispatcher.
The raid occurred on the 1900 block of Calumet Avenue, the dispatcher said. There were no injuries reported.
He said police were not notified ahead of time and only provided traffic control.
"We didn't even know about it until they said, 'hey we need your guys,'" he said.
A representative at the Chicago office of the FBI had no comment Saturday night, saying details might be available Sunday.
