Updated

Police have arrested a woman who they say made a bomb threat, prompting two buildings to be evacuated and streets to be closed in a bustling area of downtown Los Angeles.

Police Officer Tony Im says the woman was arrested Wednesday about three hours after making the threat in the lobby of a federal building around 11 a.m. No one was hurt.

Television news helicopters showed the woman wearing a backpack sitting and standing on the empty steps of the building as police surrounded the area.

Police later sent in a robot that approached the woman with a phone, but police said she didn't want to talk.

The buildings that were evacuated are near City Hall and a federal courthouse. A number of streets were closed in the area.