The Green Brigade have displayed a fresh banner blast at Parkhead just hours after receiving a letter of warning from Celtic chiefs over an "unacceptable" display.

Celtic had written to the fan group after a display during the match against Kilmarnock stated "End genocide. End Zionism" in reference to the ongoing Israel-Palestine conflict.

Club officials had warned any displays claiming to speak for the club or support was "unacceptable" and urged for no further displays of a similar nature.

The club also referenced fan trouble at away matches with reference to fixtures against Aberdeen and Motherwell in recent weeks.

And again, a warning was issued to the group with members urged to discourage fellow supporters from unacceptable behaviour.

READ MORE: Celtic letter to Green Brigade after 'unacceptable' banner

During tonight's match between Celtic and Dundee, the group unveiled a banner blasting "Police brutality - PLC complicity".

The full display read: "Police brutality - PLC complicity. Fans demand change.

"All cops are b*******"

It comes after the group had voiced concerns over "dangerous police practices" ahead of the match at Fir Park last weekend.

The Green Brigade had stated: "This is a pattern of behaviour that the club has done nothing to address despite increasing concerns of fans."

The Celtic letter read: "Good afternoon.

"With reference to the display in the front section of the Rail Seating Section at the home match against Kilmarnock on 17 February, it is noted that this a breach of the Club's Banner Protocol and the updated and agreed Rail Seating Code of Conduct.

"Regrettably, the club have received a volume of complaints about the display from other Celtic supporters and stakeholders - in particular, in respect of:

"the words "End Zionism"; and

"certain aspects of the 'call to action' ahead of the match.

"As has been discussed on many occasions, Celtic is a club that is open to all and consequently, we take these breaches of the agreed Code of Conduct and the complaints received very seriously.

"The banners displayed do not represent the views of Celtic Football Club. Suggesting that the group speaks on behalf of the Club is unacceptable. It is entirely inappropriate for any group of individuals to seek to use Celtic and Celtic Park as a vehicle for such messages, particularly when many Club colleagues and supporters have been affected by these events.

"The Club recognises that our supporters hold personal views on these matters. As a club open to all, we all belong at Celtic Park, and there is of course a range of views held by Celtic supporters. Celtic Park is a place where all colleagues and supporters should feel able to come to support our football club. Recognising this, respecting the gravity of the tragedy ongoing, we have requested in the past, and repeat that request, that there are no further such displays in breach of the agreed Code of Conduct and banner protocol.

"On a similar note, with reference to Sunday's away match versus Motherwell on 25 February, regrettably certain behaviours in respect of individuals attempting to gain entry to the stadium without a valid match ticket returned (having also been prevalent at our recent away match versus Aberdeen). The Club has also received complaints from other supporters (and the host clubs themselves) who are being adversely affected by such behaviours and these are similarly taken very seriously.

"Therefore the club again, asks that the group makes efforts to discourage any such supporters without tickets from attempting to gain access or circumvent the safety and stewarding plans.

"Regards, Celtic Football Club."