Police officers stand guard after the arrest of a man who opened fire on shoppers injuring two people before fleeing the scene outside a supermarket in Le Port-Marly, near Paris, on September 26, 2016. Police surrounded the home of the attacker, where he holed up after shooting a 57-year-old woman and a 73-year-old man in what prosecutors called a "private dispute". The shooter was already known to police for common law offences. / AFP / Thomas SAMSON (Photo credit should read THOMAS SAMSON/AFP/Getty Images)