Yemen’s Houthi rebels will head to Saudi Arabia amid efforts to negotiate a permanent ceasefire to end the long-running war in Yemen, according to the Saudi state news agency, a Houthi official and reports quoting diplomatic and government sources.

The visit, expected on Thursday night, raises hopes of a breakthrough in the quagmire conflict that has left hundreds of thousands dead through direct and indirect causes such as famine.

Ali al-Qhoom, a member of the Houthi political council, had earlier said the rebels’ delegation would fly to Saudi Arabia’s capital, Riyadh, on an Omani plane. A delegation from Oman, which has played the role of mediator, arrived in Yemen’s Houthi-held capital, Sanaa, on Thursday, according to Yemeni government officials.

“Optimism exists regarding the mediation and the Omani efforts to achieve peace in Yemen,” he posted on social media.

Al-Qhoom said talks will be focused on a full reopening of Houthi-controlled ports and Sanaa airport, payment of wages for public servants from oil revenues, rebuilding efforts, and a timeline for foreign forces to quit Yemen, among others. Sources speaking to the Reuters news agency on condition of anonymity also said the same. The topics are long-standing Houthi demands.