"Every target that's being reviewed, every effort that's being made, will always be conducted inside the international laws of war," Secretary of State Mike Pompeo said of potential strikes on Iran.
While officials say American intelligence isn't clear on whether Iran's latest military moves are designed to bolster Tehran's defenses or prepare for an offensive strike, the U.S. is continuing to reinforce its own positions in the region, including repositioning some forces. One official said the U.S. anticipated a "major" attack of some type within the next day or two.
Authorities later delayed Gen. Qassem Soleimani's burial, citing concerns about the massive crowd that had gathered, the semi-official ISNA news agency said. It did not say when the burial would take place.
The Hague Convention, signed by the U.S., requires "refraining from any act of hostility" against cultural property. The Pentagon educates troops about their obligations to safeguard such sites.
Two top Senate Democrats called on President Trump to immediately declassify the administration's reasoning for the strike on Gen. Qassem Soleimani, saying there is "no legitimate justification" for keeping the information from the public.
Caskets holding the bodies of Gen. Qassem Soleimani and others killed in a U.S. drone strike last week were paraded though the streets of Iran's cities as mourners chanted "death to America."
President Trump insisted Sunday that Iranian cultural sites were fair game for the U.S. military, dismissing concerns within his own administration that doing so would constitute a war crime under international law.
The announcement came in response to the U.S. drone strike that killed Iranian Gen. Qassem Soleimani. Tehran says it will continue to cooperate with international atomic monitors.
Within a matter of hours, Iraq moved to expel U.S. forces; the U.S. said it would pause the fight against ISIS in Iraq; and Iran signaled it will stop abiding by limits of the 2015 nuclear deal.