It was on a same night on a same beach like previous two sightings. This one was on 23:32, an airplane was landing and it flew over Novi Sad to Belgrade, it was very close then suddenly behind the plane appeared 6 small balls of light. They were white but not bright more like grayish-white. At first i was that they were flares, but it was a passenger plane, it does not have flares. It was following the plane in a half circle formation for several seconds and then it has just turned right to the south and regrouped in two formations by 3 objects. It has flew to the south for about 5 seconds and disappeared slowly.