“This will bring a lot of relief to the families of the prisoners,” he said.
Moussan said the ICRC was “facilitating” the transfer by providing air transport and logistical support, and by interviewing the detainees.
Days before the major Muslim festival of Eid-ul-Fitr, 104 prisoners were released, taking the total number freed since Friday to 973.
The Iran-backed Houthis captured Sanaa in 2014, which was followed months later by a Saudi-led military intervention.
Hundreds of thousands of people have been killed in the conflict, which has also triggered a major humanitarian crisis.