The Germans inside the pocket retreated from the suburbs of Stalingrad to the city itself. The loss of the two airfields, at Pitomnik on 16 January 1943 and Gumrak on the night of 21/22 January, meant an end to air supplies and to the evacuation of the wounded. The third and last serviceable runway was at the Stalingradskaya flight school, which reportedly had the last landings and takeoffs on 23 January. After 23 January, there were no more reported landings, just intermittent air drops of ammunition and food until the end.