PRAGUE -- Fiorentina captain Cristiano Biraghi was left with a cut on his head after he was struck by an object thrown from the West Ham crowd during the Europa Conference League final on Wednesday.

West Ham fans threw empty cups and other items onto the pitch on multiple occasions during the first half, with the most heated incident coming around the half-hour mark when Biraghi went to take a corner.

Biraghi was struck on the head, causing streaks of blood to pour down from the back of his head. He received medical treatment and continued the game with a bandage wrapped around his head.

UEFA urged fans over the in-stadium public address system to stop throwing objects in a message that read: "Attention please! This is an important security announcement. Stop throwing objects on to the pitch immediately! Please respect the players and the officials. Thank you!"

Fans throwing objects has become an increasing issue in European football this season, most notably in the Netherlands where the Dutch Football Association has decided all matches would be stopped immediately if a player or match official was hit by an object from the crowd.