DUBAI, United Arab Emirates — U.S. airstrikes targeting Yemen’s capital killed 12 people and wounded 34, the Houthi rebels said early Monday.

The deaths mark the latest in America’s intensified campaign of strikes targeting the rebels. The U.S. military’s Central Command declined to answer questions about the strike or discuss civilian casualties from its campaign.

The Houthis described the strike as hitting the Farwa neighborhood market in Sanaa’s Shuub district. That area has been targeted previously by the Americans.

Footage aired by the Houthis’ al-Masirah satellite news channel showed damage to vehicles and buildings in the area, with screaming onlookers holding what appeared to be a dead child.

Others wailed on stretchers heading into a hospital.

Strikes overnight into Monday also hit other areas of the country, including the Amran, Hodeida, Marib and Saada governorates.

The strikes come after U.S. airstrikes hit the Ras Isa fuel port in Yemen last week, killing at least 74 people and wounding 171.

The strikes follow the resumption of negotiations in Rome between the U.S. and Iran over Tehran’s rapidly advancing nuclear program, which Washington has linked to its attacks in Yemen.

The U.S. is targeting the Houthis because of the militant group’s attacks on shipping in the Red Sea, a crucial global trade route, and on Israel.

The new U.S. operation against the Houthis under President Donald Trump started after the rebels threatened to begin targeting “Israeli” ships again over the country’s blocking of aid from entering the Gaza Strip.