Video: Houthis patrol area near blown-up house of Yemen's former president. (Image: Reuters) (ABC News) Yemen's veteran former president Ali Abdullah Saleh has been killed in a roadside attack after switching sides in the country's civil war. In a speech on Saturday the 75-year-old abandoned Iran-aligned Houthi allies in favour of a Saudi-led coalition, saying he was ready for a "new page" in ties with the coalition and called the Houthis a "coup militia", leading them to accuse him of betrayal. Sources in the Houthi militia said its fighters stopped Mr Saleh's armoured vehicle with an RPG rocket outside the embattled capital Sanaa and then shot him dead. Sources in Mr Saleh's party confirmed he died in an attack on his convoy. A Houthi media official said Houthi fighters killed Mr Saleh as he tried to flee to Saudi Arabia through the province of Marib, to the east of the capital. Photo: Former Yemeni president Ali Abdullah Saleh had said he was ready for a new page in the conflict. (File: Reuters) Unverified footage circulated showing his bloodied body, just days after he tore up his alliance with the Houthis following nearly three years in which they had jointly battled the Saudi-led coalition. In a televised speech on Monday, Houthi leader Abdul Malik al-Houthi hailed Mr Saleh's death as a victory against the Saudi-led bloc, congratulating Yemenis "on this historic, exceptional and great day in which the conspiracy of betrayal and treason failed, this black day for the forces of the aggression". He said the Houthis, who hail from a Shiite Muslim sect, would maintain Yemen's republican system and not pursue a vendetta against Mr Saleh's party. Supporters of the Houthis drove through Sanaa's streets blasting celebratory war songs. Mr al-Houthi also hailed a missile launch announced by the group toward the United Arab Emirates this week as a message to its enemies, advising against foreign investment in the UAE and Saudi Arabia as their campaign in Yemen continues. Photo: Smoke has continued to rise during the battle between Mr Saleh's supporters and Houthi fighters in Sanaa. (Reuters: Mohamed al-Sayaghi) Conflict expected to escalate Warfare between the