The Houthis launched a deadly missile attack Thursday on the presidential palace in the Yemeni government's interim capital of Aden, as Saudi Arabia blamed Iran for the recent dramatic escalation in the long-running war.
The attack hit command centres located inside the Al-Maashiq presidential compound used by government forces and the Saudi-led military coalition that supports them, a Yemeni minister said on condition of anonymity.
Saudi Arabia and the internationally recognised Yemeni government it backs have come under sustained Houthi attack of late, shifting the focus of the wider Middle East war that erupted with US-Israeli strikes on Iran in February.
The Iran-backed Houthis have seized swathes of territory along Yemen's Red Sea coastline in recent weeks, and a government counteroffensive with Saudi air support has so far failed to reverse the gains.
Yemeni health minister Qasim Buhaibeh said Thursday's attack left five people dead and 16 injured "among those working to guard the site and civilian employees".
An AFP journalist saw smoke rising and residents of the southern city reported hearing explosions during the attack, the first on the complex since Yemen's civil war flared back to life in July.
Yemeni Prime Minister Shaya al-Zindani denounced the "cowardly" act on X, calling it a "continuation of its criminal pattern of striking civilian sites and civilians".
A government minister said on condition of anonymity that Zindani had been present at the time, but "was not harmed in any way".
The minister said the Houthis hit a command centre for Yemeni government forces with three missiles, and another for Saudi-led coalition forces at the complex with two missiles, adding that there were Yemeni and Saudi casualties, without providing a specific toll.
Media affiliated with the Houthis said they had targeted "the headquarters of military operations, led by Saudi officers, at the Al-Maashiq Palace in Aden, as well as weapons depots belonging to them".
Yemen's civil war -- in which Saudi Arabia has led a military coalition supporting the government since 2015 -- reignited after the collapse of a years-long truce, with the Houthis going on to launch their lightning offensive in September.
Riyadh on Thursday accused Iran of encouraging the escalation, saying it continued to arm and train the group.
Saudi Arabia's deputy minister for public diplomacy at the foreign ministry said Riyadh was still in touch with Iran, but that Tehran did not appear ready to make concessions.
"We think that the escalation by the Houthis at this latest stage of the conflict is encouraged by Iran," said Rayed Krimly.
The Saudi-led coalition said drones fired by the Houthis at the kingdom's southern region and the city of Khamis Mushait were intercepted.
Yemeni government forces said the Houthis had also fired "several ballistic missiles" at the central city of Marib, which sits in a strategic oil-rich region.
Oman meeting refused
In 2023, regional rivals Iran and Saudi Arabia reached a deal mediated by China to thaw a longstanding freeze in ties, but the latest violence might threaten to upend the entente.
The Saudi ministry official went on to accuse the Houthis of refusing to meet as fighting ramped up between the two sides.
"At the beginning of this escalation, we asked them to meet in Muscat, Oman and they refused," he added.
The ministry later said that the exchange took place in July.
Saudi Arabia suffered its deadliest attack in more than a decade on Saturday when a strike on Riyadh's international airport killed 13 people and wounded around 300 others.
The Saudi-led coalition fighting the Houthis said the group had attacked Riyadh's airport 20 times this month.
Coalition spokesman Turki Al-Malki said "the Houthis must immediately cease all terrorist operations targeting civilians and civilian facilities, including airports, ports, oil facilities, and infrastructure".
He added the group had "worked to obtain advanced technologies with the help of regional actors", saying they now had "ballistic missiles, attack and suicide drones, and fast explosive-laden boats".
The attacks on Saudi Arabia have tested the country's infrastructure and resilience, the energy minister acknowledged earlier this week.
Riyadh usually hosts a packed calendar of events this time of year, including its flagship investment conference drawing foreign leaders and business titans.
In Yemen, the conflict has caused what the United Nations calls one of the world's worst humanitarian crises, leaving most of the nation's population dependent on aid.