Iran spurned U.S. President Donald Trump's call for a new nuclear pact and a commander threatened more attacks after both sides appeared to back off from intensified conflict following the U.S. killing of an Iranian general and Tehran's retaliatory missile strikes.

Concern that the Middle East was primed for a wider war eased after Trump gave an address Wednesday that refrained from ordering more military action. But each side's next move in their protracted shadow war was unclear.

Iran fired missiles Wednesday at sites in Iraq where U.S. troops were based in retaliation for the killing in a U.S. drone attack of powerful Iranian Gen. Qassem Soleimani in Baghdad on Jan. 3. Tehran's foreign minister said this "concluded" Iran's response to his death.