Two starlike objects traverse starfield (25 degree arc). One adjusts on other. Flash infront of lead object-disappears. 2nd object turns and disappears.Commercial airline at FL310 on moonless am (1022Z) or 0322 MDT. Crew observed the two objects against the starfield moving in a "point-bearing" formation. (draw a 1" square and hold at arms length [ ]. Top left corner and lower right corner represent the formation; moving to the left. Bearing 230 at a slant angle of 10 to 15 degrees above the horizon; crossing several stars in the starfield. Looked as bright as some satellites do (faint star). After 20 degrees (now 210) trailing object started to move closer to the lead object. Almost at same time (sec or two later) there is a flash in front of lead object which appears to turn "up" and fades out. The second one mirrors the turn and also fades away. Both pilots saw the event. It lasted between 20-30 sec. No report was filed and no query made to ATC. Observation. No military areas nearby were active (0322 in the morning); slant angle and arc rate change indicate objects were fairly far away (possibly in sunlight from coming dawn). Flash in front of the lead was like a pin-prick of light `* to the left of the object. the distance between the two objects very closely matched the diameter of the moon. Observer was experienced combat fighter pilot with 5000+ hrs and over 20years of military expeience. Impression: something was fired at the two objects and almost hit the lead.