New Delhi, March 17 -- Iran urged people Saturday to evacuate the Middle East's busiest port and two others in the United Arab Emirates, openly threatening a neighboring country's non-U.S. assets for the first time as its war with the United States and Israel entered a third week.

Tehran said the U.S. had used "ports, docks and hideouts" in the UAE to launch strikes on Kharg Island, home to the main terminal handling Iran's oil exports, without providing evidence. It urged people to leave areas where it said U.S. forces were sheltering.

Hours later, there was no sign of an attack on Dubai's Jebel Ali port - the Mideast's busiest - or the Khalifa port in Abu Dhabi. But debris from an intercepted Iranian drone hitting an oil facility spar...