Israeli Prime Minister Benjamin Netanyahu threatened further retaliation.
The Houthis, who control most of Yemen’s population centres, have repeatedly launched missiles at Israel since the Gaza war broke out more than a year ago.
Israel has previously hit back against targets in Yemen, but Thursday’s were the first against the rebel-held capital Sanaa.
“The Israeli enemy targeted ports in Hodeida and power stations in Sanaa, and the Israeli aggression resulted in the martyrdom of nine civilian martyrs,” rebel leader Abdul Malik al-Houthi said in a lengthy speech broadcast by the rebels’ Al-Masira TV.
Al-Masira had earlier reported the raids that “targeted two central power plants” in and around Sanaa, while in Hodeida it said “the enemy launched four aggressive raids targeting the port … and two raids targeting” an oil facility.
It said the strikes killed seven people at Al-Saleef port, while two more were killed and others wounded in the strike on the oil facility.
