Objects were tracked by radar and sighted visually. Several balls were observed by five male experienced military witnesses and radar at an airfield for three to five minutes.

Hynek quotes the Blue Book report:

Objects were visually observed by three control operators and by the Director of Operations, who was in town to supervise a wing mission. Objects were also observed on radar by the NGOlC and GCA operation (two separate radar installations). The objects were observed for a period of three to five minutes. . . . The individual objects were about five to six miles behind an air liner and moving twice as fast. . . . One of the objects broke in two and another made a 180-degree turn. All observers were interrogated by IFF with no response. Visual estimation of the size of the objects was impossible, but the radar operator stated that the blip on his scope was about the same size as that received from a B-47. The objects appeared to stand still and then speed up and rush away.

Google map of this location.