Paris Saint-Germain's Champions League clash with Istanbul Basaksehir was delayed on Tuesday amid allegations of racism against the fourth official.

The game was stopped after 13 minutes at Parc des Princes, with both sets of players gathering on the sidelines for more than 10 minutes before Basaksehir's players walked down the tunnel. They were followed by PSG's players.

Basaksehir substitute Demba Ba remonstrated with fourth official Sebastian Coltescu, saying: "You never said 'this white guy'. Why, when you mention a black guy, do you have to say ‘this black guy’?”.

Basaksehir's English Twitter account posted a message saying the club's assistant coach, Pierre Webo, had been called a racist word by Coltescu.

The Turkish side also posted an image on its official Twitter account stating 'No To Racism' soon after the incident, with Galatasaray posting the same graphic in apparent solidarity with their counterparts.

UEFA issued a statement to say a resumption had been agreed on the condition Coltescu was stood down.

"Following an alleged incident involving the fourth official, the match was temporarily suspended. After consultation with both teams, it was agreed that the match would restart with a different fourth official," the statement read

"UEFA will thoroughly investigate the matter and further communication will be made in due course."