UFO Sighting in Parkville, Maryland on October 6th 2015 – cluster of lights in western sky. Slow movement to west and then south.

The objects were first noticed by our grandson out the bedroom window facing west. At about 8:15 pm we went outside and observed a cluster of four lights hovering in the sky. Approximate distance appeared to be about 5 miles. The lights appeared out of nowhere in the western sky. We thought at first they were helicopters. One by one they began to move to the north and then turn toward the south. They each passed directly overhead with a minimum of noise. This is when we knew they were not helicopters or military aircraft. They didn't generate enough noise to be either. Each had flashing lights...blue/green, white and red. As one would leave the cluster to begin the move to the north, another light would appear to the left of the cluster and join the line of objects. This was repeated until 10 to 15 objects had appeared and moved north and then south. The entire event took place over the span of about an hour.