Lights possibly in orbit entering the atmosphere

Two bright lights appeared at an extremely high altitude at about 20 degrees above the horizon south of my position and moved in a northern direction in line with each other for approximately 30 seconds. There were no strobes or anti collision lights that would indicate an aircraft. After a few seconds the lead light began to fade followed by the trailing light. A moment after they vanished there was a bright flash about three degrees below where the lights had been.