Two people were killed and two others wounded on Wednesday when Saudi-led coalition airstrikes hit a building under construction in Yemen's Houthi-held capital Sanaa, Houthi-run al-Masirah TV reported.

The airstrikes also destroyed a factory for producing plastic materials, the Houthi television reported without providing further details.

Both sites under attack are located in northern Sanaa.

Meanwhile, the coalition announced that its operation targeted secret sites used by the Houthi militia for storing and firing "bomb-laden drones, including a building under construction used as a secret factory for assembling the drones," the Saudi-owned Al-Arabiya TV reported.