The United States is considering quickly closing its embassy in Baghdad after a series of rocket attacks on Iraq’s Green Zone by Iranian-backed militias, according to two sources familiar with the discussions.

Why it matters: The move, among several options being considered, could be a prelude to retaliation against Iran, which President Trump and Secretary of State Mike Pompeo have branded a state sponsor of terror. The embassy has also played a pivotal role in supporting a shaky Iraqi government.

The latest attack occurred Sunday, when defensive interceptors stationed at the embassy shot down three rockets fired into the Green Zone. The protective enclave within the capital is where many diplomats live and the U.S. has its heavily fortified embassy.

An estimated eight rockets were fired overall, killing one Iraqi civilian and causing minor damage to the perimeter of the embassy complex.