Authorities are still looking into a suspicious device discovered during a weird series of events that occurred outside a police precinct in Manhattan’s East Harlem neighborhood a day ago, investigators said Thursday. The device was found in the vehicle of a man who, with his cousin, approached uniformed officers outside the East Harlem stationhouse on 119th Street near Park Avenue at midday. The man informed cops that he was the victim of a domestic assault inside the van by his cousin, who had assaulted him with a machete.