Malaysian Prime Minister Mahathir Mohamad abruptly submitted his resignation to the king on Monday after infighting in the ruling coalition over his successor came to a head, throwing the Southeast Asian nation into fresh turmoil. The statement from his office contained no other details. It was unclear whether Mahathir would step down to form a new government, or to pave the way for a successor. Earlier on Monday, Anwar Ibrahim — who is positioned to succeed Mahathir — said he had a “very good meeting” with Mahathir. “Suffice that we are clear so far,” Anwar told reporters before joining a meeting of his People’s Justice Party.