Borussia Dortmund and Liverpool have both been charged by Uefa for offences committed by fans during their Europa League quarter-final first leg on Thursday night.

European football’s governing body has confirmed disciplinary proceedings have been opened against both clubs in relation to the conduct of their fans.

Dortmund have been charged with stairways being blocked, while Liverpool face a charge in relation to their supporters letting off fireworks at Signal Iduna Park.

The cases will be dealt with by Uefa’s control, ethics and disciplinary body on 19 May, the day after the Europa League final in Basel.

Liverpool already face charges over illicit chanting, setting off fireworks, throwing objects and more general crowd disturbances by their fans from the second leg of their previous round against Manchester United at Old Trafford.

United have also been charged with crowd disturbances and throwing objects, in addition to blocked stairways.

Uefa is still investigating claims songs about the Hillsborough and Munich disasters were sung by rival fans at both Anfield and Old Trafford during the last-16 tie and further charges could yet follow.