All objects appears in the sky from se and turning to n. it was impossible to describe the altitude, because there wasn't any reference around. however, higher than a normal cruise altitude for airliners aircrafts. they came one after another, in a straight line and the distance from one another was exactly the same. difficult to measure the distance between each other, but just a few seconds between. just a bright light, no strobe light, navigation light or anti collision light. the flight path is not a normal flight path for airliners flights...I am a pilot and i know exactly the en-route flight in the area. we are talking about 20 or a few more objects..About 15 minutes with a visual contact. i can not evaluate the speed.