A flight carrying Houthi prisoners left Saudi Arabia on Saturday bound for Yemen's capital Sanaa, after which another flight will arrive to the Kingdom carrying Saudi prisoners, on the second day of the prisoner exchange operation. The flight from the southern Saudi city of Abha took off before 9 am (0600 GMT) carrying 120 former detainees, ICRC public affairs and media adviser Jessica Moussan told AFP. It was the first of three flights planned for Saturday between Saudi Arabia and Yemen. The Yemeni government and Houthi group completed the first phase of a prisoner swap deal on Friday. The deal was agreed upon last month in Switzerland and resulted in the release of 318 prisoners from both sides. The International Committee of the Red Cross (ICRC) facilitated the exchange, which took place over four trips between the airports in Sana'a and Aden. The move was met with local, Gulf, and UN approval, as well as calls for the unconditional release of all detainees related to the conflict.