Two orange flashes in the twilight sky within a few seconds of each other.Was sitting with my son on our backs looking up for the first evening star in a clear sky. This occured on the suburbs of the Kenyan city of Nairobi. I then observed a seemingly orange colored flash (perhaps 2 seconds in duration) dissolving to a faint tail light moving away. The movement appeared to be north wards. Strangely enough, less than 30 seconds later, I saw this repeated at a slighly different position but quite close to the first flash. I thought it might be two rocket stages following each other back into the earth's atmosphere.