BAGHDAD (AP) — Three Iraqi civilians were killed and two severely wounded Monday after a katyusha rocket hit near Baghdad airport, two Iraqi security officials said. It was the first time in months an attack caused civilian casualties.

The rocket targeted the international airport but struck a residential home close by instead, the two officials said. They requested anonymity in line with regulations. A child was among the dead, the officials said.

The rocket was launched from the al-Jihad neighborhood of Baghdad, the officials said.

The attacks have become a frequent occurrence, often targeting the U.S. Embassy in Baghdad, within the heavily fortified Green Zone, and U.S. troops present in Iraqi bases as well as the Baghdad airport. Roadside bombs have also frequently targeted convoys carrying equipment destined for U.S.-led coalition forces.

Previous attacks have caused minor damage but rarely deaths or injuries.

The frequency of the rockets have strained Iraq-U.S. relations, prompting the Trump administration last week to threaten to close its diplomatic mission in Baghdad if Shiite militia groups believed to be orchestrating them are not reigned in.

The disparate nature of Shiite militias following the U.S. assassination of Iranian Gen. Qassim Soleimani and Iranian militia leader Abu Mahdi al-Muhandis has complicated Iraqi efforts to clamp down on rogue armed elements.

A government raid on the powerful Iran-backed Kataib Hezbollah, suspected of launching rocket attacks, backfired when those detained were released for want of evidence.

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Abdul-Zahra reported from Boston.