The radical Iraqi Shiite leader Moqtada Sadr vowed Wednesday “to shake the ground” under Sunni Islamists overrunning parts of the country. Speaking over TV from the Shiite shrine city of Najaf, he ruled out US intervention in Iraq and criticized the meetings Iraqi commanders were holding with US military advisers who arrived in Baghdad that day. The powerful Shiite cleric said that he would back “international support from non-occupying countries.” Sadr spoke after his Mahdi Army militiamen paraded in the Baghdad suburb of Sadr City.