About 10 red lights rising in the sky, appeared to maneuver - second sighting in five years, same part of the sky.

Saw a number of red lights in the sky.  Appeared to be distant.  Originated below the horizon (obscured behind buildings) and rose in the sky while moving steadily from left to right from my perspective.  Lights were North and East of my position.
Lights moved with constant speed but did not follow a constant path.  Vertical component of velocity changed - lights changed rate of rise and at some points descended.  Horizontal component seemed steady.
Saw about 10 total lights. Initially saw them when coming around the corner of a building that obscured the sky and immediately say about 7 in the same part of the sky.  No obvious formation to them but they were all in the same few minutes of arc in the sky.  One by one the lights faded and disappeared.  As the last of the original lights disappeared a new one rose into view, then another, then another at wide intervals.  They all rose and then disappeared as the original 7 did.
Did not appear to be flares as they steadily rose and covered a very large distance (assuming hey were far away, as was my impression.)  Again, they appeared to change vertical component of velocity several times.  My sense was they were maneuvering.
I have seen this phenomena before in the same part of the sky from a nearby (2 miles away) location about five years ago.  I am an avid airplane enthusiast, an atheist, and a general skeptic - I am not prone to false beliefs and delusion.  These were not aircraft lights or flares.  I do not believe they are alien craft but I cannot explain them by phenomena known to me.