A ballistic missile attack by Iran-backed Houthis on a mosque and a religious school in Yemen has killed and injured 29 civilians, including women and children.
Two ballistic missiles were used in the attack late on Sunday in Marib province, the governor's office said in a statement.
Fighting between government forces and Houthis has escalated in recent months. The United Nations says some 10,000 people were displaced in September by fighting in Marib, the internationally recognized government's last northern stronghold. It is calling for a humanitarian corridor for aid.
Negotiation this year between Iran and Saudi Arabia, the two regional powers involved in the war, has not produced a breakthrough for peace in Yemen.
A coalition of forces led by Riyadh intervened in Yemen in March 2015 after the Iran-aligned Houthis ousted the Saudi-backed government from the capital Sanaa in late 2014. The Houthis say they are fighting a corrupt system and foreign aggression.
The Houthi movement said in October they had seized new territory in the energy-rich provinces of Shabwa and Marib, gains confirmed by sources, as it presses an offensive likely to further complicate international peace efforts.