ROME (AP) -- At least two fans have been stabbed and an ambulance attacked in clashes ahead of the game between Roma and Lazio.
The ANSA news agency reports an ambulance was abandoned after fireworks, rocks and sticks were thrown at it Monday.
After hearing of the news, Rome Mayor Gianni Alemanno made an appeal for calm ahead of the match Monday night.
There is a heavy police presence around the Stadio Olimpico and nearby stores closed early ahead of the game.
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