Hitting any sort of electric cable ( i.e with metal iside) at say 150 Kts will go through metal like a cord in butter. Hitting a propeller only and not have any fuselage colateral damage is very strange I would say.
I have some years ago seen pictures of a glassfiber glider cut in 2 ( unfortunately also the pilot ) by a small cow-fence electric wire during a attempted landing into a field , and the estimated landing speed of that glider was less than 60 Kts.