BAGHDAD, Iraq (AP) _ Iraq is challenging the no-fly zones patrolled by the United States and Britain by flying its warplanes there, Vice President Taha Yassin Ramadan said Tuesday.

The move came a day after U.S. aircraft fired on an anti-aircraft battery in the northern no-fly zone. Iraq says four soldiers were killed.

Asked if Iraq was flying its own aircraft in the no-fly zones, Ramadan said: ``We are doing it right now.''

``Iraqi planes in effect are flying in a normal manner in Iraqi air space,'' he told Associated Press Television News.