A senior Yemeni rebel commander was killed on Thursday, the Shiite rebels announced as fierce battles with government forces intensified along the front lines in the country’s central provinces.

The slain rebels’ special forces commander, Mohamed Abdel Karim Al-Hamran, enjoyed close ties to the top Houthi leader, Abdul Malek Al-Houthi. He was the most high-ranking commander killed this year, part of an elite brigade trained by militants from the Lebanese group Hezbollah.

Al-Hamran was killed in clashes between the central provinces of Marib and Bayda, which have been the epicenter of recent fighting, said Yemeni security officials, speaking on condition of anonymity under regulations.

Warplanes with the Saudi-led coalition supporting the Yemeni government forces bombed Houthi targets across the provinces, setting military convoys ablaze. Dozens were killed and wounded on both sides, the officials added.

The rebel military spokesman Yehia Sarea accused their adversaries of launching 11 ground assaults across the front lines in Marib and Bayda, and unleashing 110 airstrikes, including on the rebel-held capital of Sanaa.

Yemen’s conflict, now grinding into its sixth year, shows no signs of abating despite the grave threat posed by the coronavirus pandemic and the unilateral cease-fire announced by Saudi Arabia last month.