Three Katyusha rockets landed in the perimeter of Baghdad International Airport on Wednesday, the Iraqi military said.
The military said it found a rocket launcher with a timer in a rural area in western Baghdad, and there were no reported damages or casualties.
There was no immediate claim of responsibility.
The rockets were fired from the Bakriya neighbourhood, about 6 km (4 miles) northeast of the airport, and security forces were deployed to search the area, security sources said.
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Security officials said it was not immediately clear whether a military base which hosts U.S. troops near the airport was the target of the attacks.
Iran-backed paramilitary groups have regularly been rocketing and shelling bases in Iraq that host U.S. forces and the area around the U.S. Embassy in Baghdad.