Apparent fan attack suspends Boca-River match: 'It's unbelievable what happened'

Chaos on the pitch in Buenos Aires, Argentina, on Thursday night.

A match between Boca Juniors and River Plate, a round-of-16 Copa Libertadores clash, was suspended after River players were apparently sprayed with a substance that affected their vision as they came back out on the field for the second half.

ESPN FC has more:

The first half of the match ended 0-0. River players rubbed their eyes as they entered the field to start the second half through a makeshift tunnel, many using their shirts to try to clear their vision. ...

Television images showed a fan sliding a hand through the flexible tunnel that shields players entering the field. The images suggested he was spraying some kind of irritant.

"My whole body hurts," said River's Leonardo Ponzio. "They threw, I'm not sure what it was, pepper spray at us. This just can't be."

"It's sad," said River coach Marcelo Gallardo. "It's unbelievable what happened."

A date for the completion of Thursday's match has yet to be decided.