First pictures have emerged of Celtic fans in Rome ahead of the Europa League clash against Lazio.

Celtic are due to play Lazio in a Europa League clash at the Stadio Olimpico on Thursday evening.

Pictures from agency Getty show Celtic fans setting off flares and singing in the sunshine ahead of the crucial game.

Italian police said five Lazio fans and two Celtic supporters were arrested last night ahead of the game that many feared would be marred by trouble following high tensions between supporters in the early encounter at Celtic Park.

READ MORE: Two Celtic fans 'stabbed' in Rome outside Irish pub ahead of Lazio match

Two Celtic fans needed hospital treatment after they were stabbed by masked attackers in Rome.

HeraldScotland:

Supporters are advised to avoid wearing club colours while walking around Rome, particularly in the evening, stay in large groups where possible and keep a low profile.

A Celtic spokesman said: “We can confirm that two fans have been injured after being stabbed last night.

“Both are now in hospital and will receive every support from the club and the British consulate in Rome.

“Again we would strongly advise supporters to closely follow all guidance issued by the club.”

READ MORE: Lazio vs Celtic: Herald and Times sports writers give predictions for Europa League crunch tie 

The Glasgow club and Lazio were charged by Uefa over “illicit chants” heard during their Europa League match on October 24.

Celtic were also charged over the display of an “illicit banner” during the game, which they won 2-1.