Israel launched fresh airstrikes on Yemen’s capital, Sanaa, late Sunday, targeting energy infrastructure controlled by Iran-backed Houthi rebels. The strikes came just days after the Houthis claimed to have fired a missile toward Israel, escalating tensions in the region.

Israeli strikes in Yemen’s capital Sanaa killed at least six people, according to the country’s Iran-backed Houthi rebels, who have repeatedly launched missiles and drones at Israel throughout the Gaza war.

Israeli Prime Minister Benjamin Netanyahu, speaking from the Air Force command centre in Tel Aviv, vowed to intensify operations against the Iran-backed Houthis, who have been launching missiles and drones toward Israel and attacking ships in the Red Sea for nearly two years.