A police officer has been placed in an induced coma in France’s Normandy region after being injured by fireworks during celebrations following Paris Saint-Germain’s Champions League final victory over Inter Milan, police sources said on Sunday.

“An investigation has been opened for intentional violence against a person in a position of public authority,” said Gauthier Poupeau, a public prosecutor for the northwestern town of Coutances.

According to initial findings, the officer was struck in the eye after a firework went off accidentally, a police source said.