PLEASE HIDE POLICE OFFICER'S FACES PRIOR TO THE PUBLICATION - French police officers near the entrance of Notre-Dame cathedral in Paris, France on June 6, 2017. Anti-terrorist prosecutors have opened a probe after police shot and injured a man who had tried to attack an officer with a hammer outside Notre Dame cathedral. The officer was slightly injured in the attack outside the world-famous landmark in central Paris. One of his colleagues responded by shooting him, wounding the attacker, whose motives were not immediately known, according to a police source. Photo by Alain Apaydin/ABACAPRESS.COM