The United States "will not tolerate attacks on US interests and expects the Iraqi government to immediately take all measures to dismantle the Iran-aligned militia groups in Iraq," spokesman Tommy Pigott said in a statement.

Deputy Secretary of State Christopher Landau summoned Iraqi Ambassador Nazar Al-Khirullah and expressed the US government's "strong condemnation" of the attacks, "including the April 8 ambush of US diplomats in Baghdad," Pigott said.

He did not provide any details about the alleged ambush.

Iraq was dragged into the war between the United States, Israel and Iran, with strikes repeatedly targeting both US interests -- especially the embassy in Baghdad -- and pro-Iranian groups in the country.

Pro-Iranian armed groups announced Wednesday that they would suspend their attacks for two weeks, following the announcement of a ceasefire between the United States and Iran.

"While acknowledging the efforts of Iraqi Security Forces to respond to these terrorist attacks, the Deputy Secretary emphasized the Iraqi government's failure to prevent these attacks," Pigott said.

He added that the US-Iraq relationship was "adversely" impacted by the fact that "some elements associated with the Iraqi government continue to actively provide political, financial, and operational cover for the militias."