Gunmen on Thursday shot dead Col. Ibrahim al-Senussi Akila, a top government intelligence official in Benghazi, a day after a political leader in that eastern city rejected the election of a new prime minister. On Monday, the parliament speaker confirmed the appointment of Ahmed Miitig as Libya’s new premier after a chaotic vote in the General National Congress highlighting tensions between Islamists and liberals. On Wednesday night, Ali al-Hassi, spokesman for a self-proclaimed autonomous government in eastern Libya, rejected Mr. Miitig’s election.