Match abandoned after AR hit with a streamer

Think South American football and one of the first images that will come into your mind is falling ticker tape from the stands. That was established as far back as the Argentinean World Cup in 1978.
Fast forward to the present day: on Wednesday night the Copa Sudamericana match between Nacional and Universidad de Chile was abandoned after a Paraguayan assistant referee was hit in the head with a streamer/cash register roll thrown from the stands. The assistant referee was reportedly carried off a stretcher and referee Antonio Arias (PAR) abandoned the match. Goals in the 11th and 12th minutes had the home side, Nacional, trailing 2-0 at the time of the headshot, so it was most likely the work of a disgruntled fan with an impressively accurate throwing arm.

Source: Yahoo Sports