ANKARA, Turkey (AP) _ U.S. jets bombed military sites in northern Iraq on Friday for the third consecutive day after being fired upon by Iraqi anti-aircraft artillery, the U.S. military said.

The artillery was based near Bashiqah, 250 miles north of Baghdad, the Germany-based U.S. European Command said.

Operating out of Incirlik air force base in southern Turkey, the United States and Britain have been enforcing northern no-fly zone in Iraq since the end of the Persian Gulf War in 1991. Allied forces impose a similar no-fly zone in the south of Iraq.

President Saddam Hussein, who says the zones violate Iraqi sovereignty, has been challenging the patrols since December 1998.