Bad weather has delayed by one day the joint naval exercise of U.S., Bulgarian and Romanian naval forces in the Black Sea, Reuters cited a statement by the Bulgarian defence ministry as saying on Tuesday. A U.S. navy destroyer was due to take part in manoeuvres with Romanian and Bulgarian warships in the Black Sea across the water from the Crimean Peninsula. To the north in Poland, U.S. fighter jets are also to take part in joint exercises, with Poland's president expected to review the manoeuvres. The United States stressed that both training drills were planned before the Ukraine crisis.