An attack on the Boca Juniors bus by rival fans which left players suffering cuts from broken glass and feeling the effects of tear gas has led to the postponement of the second leg of their Copa Libertadores final at River Plate.

The match between the Buenos Aires rivals on Saturday evening was initially delayed twice after the Boca bus came under attack as it arrived at the stadium.

Television footage showed River supporters hurling objects at the bus as it made its way to the El Monumental ground.

According to reports in Argentina, Boca players were injured by flying shards of glass from broken windows and were also taken ill due to the effects of tear gas used by the police to disperse the crowds.

A number of players, including Boca's former Manchester City striker Carlos Tevez, were reportedly suffering from dizziness and vomiting and being treated by club doctors.

Footage apparently from inside the Boca dressing room showed the players groggy and disorientated.

Reports said Boca's Pablo Perez and Gonzalo Lamardo had been taken by ambulance to hospital, the former with slivers of broken glass in his eyes and the latter a cut on his head.

The bus driver, meanwhile, was reportedly knocked unconscious after being hit by a rock.

The final is finely poised at 2-2 after the first leg two weeks ago.

River later announced the match had been suspended and would take place at 8pm on Sunday.

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