7 gray lights in the evening sky.Took my dog for a walk. Heard plane (jetliner) flying above, gone in darker area after my house for a dog to do its stuff, looked in the sky to spot the plane Suddenly, ~7 fast moving objects, grayish colour travelled through the sky. Formation random and changing rapidly. No craft (man made) could fly so fast, changing formation so rapidly with absolute no sound. There was jetlainer flying at high sky normal high ~10km. Those objects flew ~1-3 km. hard to say couse no visible shape just lights. Gone through the sky from one corner untill couldnt see in 6-7s. Too fast to be able to take photo.((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))