Crisis negotiators are trying to talk down a 19-year-old man who climbed onto the roof of a home, carrying a knife, for unknown reasons in the 2900 block of Clay Avenue in Logan Heights, according to San Diego Police.

The young man has put down the knife and seems calm but has refused to come down from his perch for more than an hour. He has, however, begun speaking to officers and answering their questions, an SDPD sergeant says.

—City News Service