JERUSALEM Israeli authorities have imposed a gag order on a new investigation by the Shin Bet domestic security service into a senior official in Prime Minister Benjamin Netanyahu’s office, Haaretz newspaper reported on Sunday. According to the newspaper, the investigation also involves “another individual, a protest activist who is not employed in Netanyahu’s office.” “The gag order was issued last week, and stipulates a 30-day publication ban on the details of the case,” the daily said. No