BISMARCK, N.D. — Flooding-related problems in North Dakota continue to disrupt Amtrak passenger rail service between Minnesota and the Pacific Northwest. Amtrak on June 1 suspended the Empire Builder line between St. Paul, Minn., and Spokane, because of water-related track problems between Devils Lake and Rugby in northeast North Dakota. Amtrak says the line will remain closed through at least Monday with a couple of exceptions. On Friday and Monday, a train will travel from the Pacific Northwest as far east as Whitefish, Mont., arriving there the next mornings with a train departing westbound to Spokane those evenings. Amtrak spokesman Marc Magliari says no decisions have been made on Empire Builder service beyond Monday.