Yemeni officials say Saudi-led warplanes bombed Shiite rebel positions in a western city, setting off explosions and drawing return fire from anti-aircraft guns. Airstrikes also hit a factory in the city and 23 workers died there.

The bombings came as the Saudi-led campaign against Yemen's Shiite rebels entered its seventh day.

The officials say the early Wednesday strikes targeted Hodeida, a port city on the country's western, Red Sea coast controlled by rebels known as the Houthis.

The officials suspect the factory, which makes dairy products, was being used as a rebel weapons cache. It was not immediately known if the workers died from the airstrikes, return fire or subsequent explosions.

The officials spoke on condition of anonymity because they were not authorized to speak to the media.