DUBAI: By launching a Scud missile at Saudi Arabia, Yemen’s former president Ali Abdullah Saleh has sent a signal that he needs to be a factor at upcoming peace talks in Geneva aimed at ending two months of war.

Saleh, the strongman who resigned following the 2011 “Arab Spring” protests after more than three decades in power, has emerged as the main military ally of Houthi fighters, now the most powerful force in the country.

Saudi Arabia has been targeting the Houthis for two months from the air in support of the government led by Saleh’s successor, Abed Rabbou Mansour Hadi, who evacuated the country in the face of a Houthi advance.

The Saudi-led campaign is aimed in part at sending a message to the Houthis’ main backers, Iran.

But Yemen watchers say the country’s remaining Scuds are in the hands of Saleh and military units under his command, not the Houthi fighters that he has supported.

By firing one of the missiles Saturday and stepping up heavy artillery attacks on border positions in battles that have killed at least six Saudi soldiers since Friday, the old master has sent a message ahead of the talks which start Sunday, reminding Riyadh that the war won’t end without him.

“The border attack was an attempt to demonstrate his strength as Yemen’s top military force, maximize his influence at Geneva and give him the upper hand,” said Farea al-Muslimi, a researcher at the Carnegie Middle East Center.

The Scud targeted the largest air base in southern Saudi Arabia, the first time in the conflict that Yemeni forces have used a missile capable of hitting targets so deep in the kingdom. It was shot out of the sky by Saudi patriot missiles.

“The Houthis themselves are not yet well-trained enough to fire a missile like that. The skill and expertise needed to operate the missile and target an air base are probably only present in the rump of Saleh’s army,” said Michael Elleman, a senior fellow at the International Institute for Strategic Studies (IISS).

Saleh, himself a member of the Houthis’ Zaydi minority sect which ruled a thousand-year kingdom in North Yemen until 1962, tried to crush the Houthis while in power. Saudi Arabia helped him during a 2009 war with the fighters.

But after giving up power to Hadi in a deal brokered by Saudi Arabia and its allies, Saleh quietly formed an alliance with the fighters. Military units loyal to him stood by, refusing to defend Hadi while the Houthis captured the capital last year.

The border fighting in recent days has seen military units still loyal to Saleh take a far more aggressive role on the battlefield.

Saudi officials previously boasted that their air campaign had destroyed Yemen’s cache of ballistic missiles capable of striking the kingdom’s cities. By firing one, Saleh’s forces demonstrated the campaign has not wiped out that capability.

The Scud launch was paired with an artillery assault on the border which Saudi-owned Al-Arabiya TV said was confronted with airstrikes and helicopter fire in a battle lasting 10 hours.

The fighting seems aimed at changing military calculations in Riyadh before the talks that begin Sunday. Saudi commanders had prepared for an assault on the Houthis to teach Iran a lesson, rather than a war against Yemen’s army.

“The Saudi objectives in Yemen appear more about standing up to Iran and showing that it will fight back if it tries to expand its influence in the Arab world,” Elleman said.

Firing the Scud proves that Hadi’s Saudi-backed government never wrested control of the most powerful military units from Saleh.

“Ever since 2011 when power was transferred to Hadi, he worked to gain control over the strategic missiles, and especially the strategic Scud missiles. But the will of our heroic men and forces allowed them to take back this supply,” Brig. Gen. Sharaf Luqman, a spokesman for forces loyal to Saleh, told the Houthi TV channel Al-Masira Saturday. “We’ve sent a message, with a single Scud, to the Saudi-Zionist enemy so it understands what to expect as a result of its excess and arrogance.”

Arab airstrikes on missile stores throughout the country have killed at least 100 people in over two months as the bombings set off huge secondary explosions that sent munitions flying into the air and crashing into civilian areas.

The Saudi-led alliance’s spokesman, Brig. Gen. Ahmed Asiri, has previously said the campaign had succeeded in neutralizing the threat of Yemen’s missiles. He rowed back Saturday, saying 80 percent of Yemen’s estimated arsenal of 300 Scuds had been destroyed.