A referee was knocked out in second division game between Ferro and Tiro in Argentina by a player he showed a yellow card.
Alejandro Roncaglia, brother of Fiorentina defender Facundo Roncaglia, reacted angrily to a booking by the referee, Arnaldo Beron.
Beron laid motionless on the pitch after he was knocked out and was later taken to the hospital in an ambulance.
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