Liverpool face punishment for the behaviour of some of their fans after Uefa announced Thursday they have opened disciplinary proceedings into the attack on the Manchester City bus before Wednesday's Champions League quarter-final first leg.

The City bus was pelted with objects on arrival at Anfield before the match, which Liverpool won 3-0.

In a statement on its website, Uefa said the proceedings covered ‘setting off fireworks, throwing objects, crowd disturbances and acts of damage’.

 The case will be heard on May 31, five days after the Champions League final.

City manager Pep Guardiola said he ‘doesn't understand’ the attack, while former Liverpool captain Steven Gerrard told BT Sport that some supporters ‘overstepped the line’ and were ‘bang out of order.’  Liverpool released a statement on Wednesday night, condemning the conduct of the individuals and expressing their regret for the incident.

‘We apologize unreservedly to Pep Guardiola, his players, staff and officials,’ the statement read.

 ‘The priority now is to establish the facts and offer Manchester City whatever support is necessary.’

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