The number of civilians killed in Saudi-led air strikes on a missile depot in Yemen's capital Monday has risen to 28, a medic said, updating an earlier death toll of 18.

Among the dead were three employees at Al-Yemen Al-Yawm television channel, including a journalist, the source said, adding the toll may mount due to a large number of people in critical condition.  

The two air strikes sparked powerful explosions that flattened nearby houses and shook faraway neighbourhoods.