The government and rebels have been exchanging proposals in recent days to settle the conflict, one of three that the government is fighting on its territory, and Sanaa was waiting for a final agreement from rebel leader Abdul-Malik Al-Houthi.
"A deal is expected to be finalized soon with the rebels to end the war," the official said.
Yemen said last week it had handed the rebels a timetable for implementing the government's cease-fire terms, a week after rejecting their truce offer because it did not include a promise to end hostilities with Saudi Arabia.
Saudi Arabia was drawn into the conflict in November when the rebels seized some of the Kingdom's territory, complaining that Riyadh was letting Yemeni troops use its territory for attacks against them. Riyadh declared victory over the infiltrators last month.
A mediator signaled on Tuesday possible progress in efforts toward a truce between Yemeni government forces and the rebels, who complain of social, religious and economic discrimination.
Al Jazeera television quoted the unnamed mediator as saying Sanaa had agreed on rebel representatives joining committees to oversee the implementation of a cease-fire.
Qatar brokered a short-lived cease-fire between the government and rebels in 2007 and a peace deal in 2008, but clashes soon broke out again.
Yemeni President Ali Abdullah Saleh unilaterally declared the war over in July 2008, and full-scale fighting resumed a year later.
