Two Katyusha rockets fell near Baghdad airport on Sunday but caused no casualties, the Iraqi military said.
Sunday’s incident is the third such attack on sensitive sites in the capital this week.
On Saturday, a rocket fell inside Baghdad’s heavily fortified Green Zone, which houses government buildings and foreign missions, while three others landed there on Thursday.
Those attacks also caused no casualties.
Washington blames such attacks on Iranian-backed militia groups.
Iran has not directly commented on the incidents.
Iraq, often the scene of spill-over violence from United States-Iran tensions, seeks to avoid being drawn into any regional conflagration.
The Middle East came close to a large conflict in January after a United States drone strike killed Iranian General Qassem Soleimani and Iraqi paramilitary chief, Abu Mahdi al-Muhandis, at Baghdad airport.
Iran-aligned militias have sworn to avenge their deaths.