MANAMA, Bahrain (AP) — The killing of journalist Jamal Khashoggi "undermines regional stability" and the U.S. State Department plans to take further action in response to the killing, U.S. Defense Secretary Jim Mattis said Saturday at an international conference in the Middle East.

Mattis never mentioned Saudi Arabia directly in connection with the Oct. 2 slaying of Khashoggi at the kingdom's consulate in Istanbul, Turkey. But he noted that Secretary of State Mike Pompeo revoked visas of Saudis implicated in the killing of the Washington Post writer, and he said additional measures will be tak...