U.S. airstrikes struck around Yemen's rebel-held capital overnight into Monday morning, attacks that the Iranian-backed Houthis said killed at least three people.

The full extent of the damage wasn’t immediately clear. The attacks followed a night of airstrikes early Monday that appeared particularly intense compared to other days in the campaign that began March 15.

The strikes around Sanaa, Yemen's capital held by the Houthis since 2014, and Hajjah governorate also wounded 12 others, the rebels said.

Their Al-Masirah satellite news channel aired footage of broken glass littering homes in Sanaa after the concussive blast of the bombs, but continued not to show the targets of the attacks — suggesting the sites had a military or intelligence function. Strikes there killed one person, the rebels said.

Another strike targeting a pickup truck in Hajjah killed two people and wounded a child, the Houthis said. It marked the first, publicly known time the American strikes targeted a vehicle in this campaign.

An Associated Press review has found the new American operation against the Houthis under President Donald Trump appears more extensive than those under former President Joe Biden, as the U.S. moves from solely targeting launch sites to firing at ranking personnel as well as dropping bombs in cities.

The new campaign of airstrikes, which the Houthis now say have killed at least 61 people, started after the rebels threatened to begin targeting “Israeli” ships again over Israel blocking aid entering the Gaza Strip. The rebels in the past loosely defined what constitutes an Israeli ship, meaning other vessels could be targeted.

The Houthis had targeted over 100 merchant vessels with missiles and drones, sinking two vessels and killing four sailors from November 2023 until January of this year. They also launched attacks targeting American warships, though none has been hit so far.