Celtic have issued a fresh warning to fans travelling to Rome for their Europa League clash with Lazio.

Italian police have put in place a 37-hour alcohol ban ahead of what is being described as a high-risk clash on Thursday evening.

Tensions have been heightened between the two sides following the first leg in Glasgow.

Lazio fans sparked outrage after marching through the city's Buchanan Street making fascist salutes.

They were later countered inside the stadium by Celtic fans holding a large banner of Italian dictator Mussolini haning upside down with the caption "follow your leader".

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Celtic have now drawn up emergency advice to fans, which they "strongly advise" supporters take note of before travelling.

The list includes a warning to Hoops fans to "stay in large groups",  "keep a low profile" particularly in the evening and "avoid wearing club colours". 

Italian police have inforced an alcohol ban in the city centre, with sale prohibited from Wednesday at 5pm until Friday at 7am.

Anyone drinking on the streets will incur an on the spot €100 fine.

It's thought around 9000 Hoops fans will travel to the Italian city for the match.

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Fans have also been advised that anyone using the supporters' shuttle service will be searched by police, with the notice warning "under no circumstances should supporters make their own way to the stadium". 

Once at the stadium, fans will be searched and asked to produce photo ID.

Bags will not be permitted in the stadium and all banners will be checked - with banners containing any political messages not allowed inside.

Celtic fans will be kept in the stadium for up to an hour after the full time whistle before embarking on a shuttle service back to the city centre.