Fiorentina captain Cristiano Biraghi was left bleeding after being hit by a missile thrown by West Ham supporters.
The left back was taking a corner just before the 35 minute mark when a number of objects reigned down on him from the stands. And blood then visibly streamed from his face as referee Carlos del Cerro halted the action and threatened to take both sides off the field.
Play resumed after lengthy consultation between the officials and team captains, and the subsequent stadium announcement was made: "An important security announcement. Stop throwing objects onto the pitch. Please respect players and the officials."
