Admiral : `` At least one '' foreign vessel was in Swedish waters . Helicopters , battleships and minesweepers hunted for the vessel . The search continued until late afternoon when a helicopter spotted it at about 10 miles off shore. Russia denies that any vessel was in Swedish waters .
Admiral : `` At least one '' foreign vessel was in Swedish waters . Helicopters , battleships and minesweepers hunted for the vessel . Emergency radio call in Russian was picked up by Swedish military , report says . Russia denies that any vessel was in Swedish waters .