In his first comment to reporters, Police Commissioner Ronnie Alsheikh said Tuesday that the search for the Dizengoff gunman Nashat Melhem, now in its fifth day, has been expanded beyond the city’s metropolitan boundaries. The gunman, he confirmed, was guilty of three murders last Friday, the two Israeli men he gunned down and an Arab cab driver found dead an hour later. Alsheikh defended his policy of withholding information from the pressand refused to answer questions. He argued that published details would compromise the investigation and the safety of police forces. The commission spoke during a visit to the family of Aon Bakel, one of the victims of the shooting.