Your story remind me of one that I heard from a Ukrainian friend.
That was way after I got out of the Army, but the Ukrainian Colonel told me during his time in Afghan, there was one of the hill/cave that no one was there for more than 30 years, but once upon a while, radio chatter in Ukrainian would place a distress call to their HQ and request assistance at that location, and everytime ISAF receive these call, they send people to investigate, and nothing and no one were there, but local keep seeing people in green uniform (Russian wear green uniform in Afghanistan back in 1980s) walking around the hill/cave area and talking to themselves and playing.
My friend believe they were soviet troop with Ukrainian descent who were kill there during the Soviet war in Afghanistan, which to me, was just spooky.