Poland’s police detained five people after a shooting on Krakow’s Main Market, where six people were killed. Central Bureau for Combating Cybercrime officers made the arrests in different parts of the country, after reviewing online activity that could pose a potential threat, RMF24 reported. Investigators and the bureau checked materials on the internet connected to the glorification of the Krakow attack. Police focused in particular on possible copycats, according to the ministry spokesperson Karolina Galezka. Galezka said the five detainees may, to some extent, have been copycats of the 24-year-old attacker, Michal Oxinscsy, identified by RMF24 as the gunman. The attack took place on 7 November at the Main Market when the man drove into the square and opened fire with automatic weapons at random people. Six people died and 16 were injured, including two police officers. The attacker later died in hospital on the morning of 9 November. Poland’s prosecution began investigating the events on 8 November. Officers found the bodies of three relatives of the attacker, his parents and sister, at the family home in Ostrowiec Swietokrzyski Province. Investigators had four phones seized from the attacker and from a vehicle, as well as electronic equipment seized from the home. The prosecution said the attacker had a firearms licence since March 2026. Prosecutors have not named motives, and the investigation into the case is ongoing.