SANAA (AFP) — Israeli strikes in Yemen’s capital Sanaa on Sunday 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.

Agence France-Presse (AFP) images showed a large fireball lighting up the skies over the rebel-held capital, leaving behind a column of thick, black smoke.

The Houthi-run Saba news agency reported six people killed and 86 wounded in the Israeli raid, with more than 20 in critical condition, citing the health ministry.

A Houthi security source told AFP the strikes had targeted a building in central Sanaa. The group’s Al-Masirah TV reported they had also hit an oil company facility and a power station in Sanaa’s south which was already struck last Sunday.

The Israeli army said it had hit a military compound where the presidential palace is located, along with two power stations and a fuel depot.

The strikes were “in response to repeated attacks by the Houthi terrorist regime against the State of Israel and its civilians,” including “in recent days,” it said.

Late Friday, the Houthis fired a missile that Israeli authorities said had “most likely fragmented in mid-air.”

Media outlets the Times of Israel and Ynet, citing the Israeli military, reported the missile had carried a cluster warhead, the first of its kind known to have been fired from Yemen.

‘Heart of the capital’

The Israeli defense ministry released a photo on Sunday showing Prime Minister Benjamin Netanyahu, Defense Minister Israel Katz and military chief Eyal Zamir following the strikes in Yemen from a command bunker.

Netanyahu said the air force had struck “the presidential palace in the heart of the capital Sanaa, the city’s power plant and the fuel tanks that supply it,” according to a statement released by his office.

“The terrorist Houthi regime is learning the hard way that it will pay — and has paid already — a very high price for its aggression against the State of Israel,” he said, adding “the whole region” was also learning a lesson in Israeli power.

In a statement from their political bureau, the Huthis vowed to respond, saying they would “not deviate from the fight” against Israel and its ally the United States “until the aggression stops and the (Israeli) blockade on Gaza is lifted.”

Iran’s foreign ministry on Sunday condemned the Israeli strikes.