CAIRO — An Iranian strike hit a Chinese firm’s building in northern Kuwait Thursday morning, severely damaging the structure and killing a worker, Kuwait’s military said, hours after Jordan’s air defenses shot down five missiles launched from Iran.

The attacks came after the U.S. military said it had completed “a heavy wave of strikes against Iran,” conducted in response to an earlier Iranian missile attack on a U.S. base in Jordan.

Central Command said in a social media post that the U.S. had struck “dozens” of targets belonging to Iran’s Revolutionary Guard Corps, including military command centers as well as missile and drone facilities, and coastal surveillance and defense sites.

No casualties were reported from Jordan’s interception of the missiles, Jordan’s state-run Petra news agency said, quoting the spokesman for the country’s armed forces.

The flare-ups on multiple fronts after several days of relative calm raised the risk of a return to all-out war. It also underscored the difficulty of winding down a five-month conflict that has jolted the world economy and is unpopular among Americans. The fighting was likely to add to concerns that the U.S. is further drawing down already diminished stockpiles of sophisticated munitions needed to defend its bases and allies.

U.S. strikes Iran

The U.S. Central Command said in a social media post that the United States had struck “dozens” of targets belonging to Iran’s Revolutionary Guard Corps, including military command centers as well as missile and drone facilities, and coastal surveillance and defense sites.

The new strikes came hours after U.S. President Donald Trump vowed to hit Iran “very hard” after it targeted a base in Jordan that hosts U.S. troops.

Iran’s official IRNA news agency said three people were killed and two were wounded in a strike on the island of Qeshm, which lies just off the Iranian mainland in the Strait of Hormuz.

The latest barrage came after the U.S. partnered with Saudi Arabia to strike Iran-backed militias in neighboring Iraq, killing at least 20 fighters and six Iranian advisers on Wednesday.