Celtic captain Scott Brown showed "solidarity" with Rangers midfielder Glen Kamara ahead of today's Old Firm derby.

The pair were seen exchanging words prior to kick-off with Brown having his arm round Kamara.

Celtic tweeted the imagine with the caption "Solidarity👊" and it has already racked up hundreds of retweets and favourites.

Kamara was the target of an alleged racist incident on Thursday during Rangers' Europa League match against Slavia Prague.

Kamara issued a statement through his lawyer in which he gave a graphic account of the alleged incident – which Slavia defender Kudela denies – and demanded action from UEFA.

It came hours after Slavia asked police to investigate allegations that a Rangers player carried out an assault in the Ibrox tunnel – and claimed Gers boss Steven Gerrard is a key witness.

In the statement Kamara said: “If UEFA genuinely wants to ‘show racism the red card’, then it’s time to stop the tokenism and take a zero-tolerance approach.

“As a player I do not expect myself, nor any other to have to tolerate racial hatred on or off the pitch in 2021.

READ MORE: Rangers legend Ally McCoist pinpoints his Scottish Premiership player of the season

“The vile racist abuse by Ondrej Kedel [sic] took place on the international stage, and any failure to act by UEFA will be viewed as a green light for racism.”

Kamara had to be held back by team-mates as he reacted with fury when Kudela wandered alongside him late in the game, cupping his hand before allegedly whispering a discriminatory slur – “you’re a f****** monkey, you know you are”, according to the Finn’s statement – into the midfielder’s ear.

The match, which was won 2-0 by Slavia after Gers had two men sent off, was played to a finish as the Light Blues opted against walking off in protest.

READ MORE: Rangers star Alfredo Morelos pictured with smoke bombs following goal against Celtic

Gerrard and Rangers chairman Douglas Park, however, were later seen confronting the Slavia delegation after the full-time whistle as they raged against the treatment of Finland international Kamara.

Slavia say a Rangers player landed a punch on Kudela as the altercation spilled over into the tunnel – a claim Rangers maintain has been made in order to deflect from the racism storm.

UEFA has already announced it will be investigating the game – but Slavia are also demanding that police officers probe events.

In a statement, the Czechs – who now will face Arsenal in the Europa League last eight – said: “Slavia Prague filed a criminal complaint with the Scottish Police through the Embassy of the Czech Republic in Great Britain for physically assaulting player Ondrej Kudela.

“The submission contains the names of witnesses who, in addition to representatives of Slavia Prague, were also representatives of the UEFA delegation and Rangers coach Steven Gerrard.”