Two days of fighting between Yemeni government forces and Houthi rebels have killed at least 48 people, Yemeni military officials said Sunday.
The Iranian-backed rebels attacked in a region between central Marib and Shabwa provinces, and were beaten backed by loyalist solders.
A Yemeni general says his forces will not stop fighting until they have retaken the entire region from the Houthis.
A cease-fire between Yemeni forces and the rebels has largely held, despite occasional flare-ups of fighting.
The truce is aimed at reaching a permanent settlement in Yemen during ongoing U.N.-sponsored talks in Kuwait.
Fighting on the ground in Yemen along with Saudi-led airstrikes have led to a humanitarian catastrophe, with the U.N. saying 80 percent of Yemeni civilians are in dire need of food and medicine.