A Polish surgeon, Professor Michal Pędziwiatr, has claimed that his colleague, Dr Mateusz Wierdak, played a crucial role in saving the life of an injured police officer during Saturday's mass shooting in Krakow. The doctors, who were having lunch with their families near the city's Main Market Square, sprang into action when they heard gunshots. Pędziwiatr stated that they rushed to the scene and began treating victims as ambulances were not available. Wierdak, a renowned surgeon in Krakow, reportedly used his hand to stem the bleeding from the most injured policeman until an ambulance arrived. The two police officers, Jakub Kulik and Artur Morański, are being hailed as heroes for their role in preventing further casualties. The attacker, who remains in critical condition, is believed to have been inspired by far-right ideologies. Prosecutors have launched a terror investigation into the incident, which left six people dead and 15 injured. The rampage occurred shortly before 15:00 local time on Saturday in Krakow's historic center. Witnesses described scenes of panic and confusion as the attack unfolded, with shops having their glass fronts shattered by bullets and a tram being shot at. Six Dublin Civil Defence volunteers also assisted in the aftermath, providing medical care to injured individuals. The suspect wore military tactical gear and was armed with a military-grade weapon but was not a member of the Polish armed forces. Poland's Interior Minister has suggested that the suspect was fascinated by far-right ideologies and held ultra-nationalist views. The mayor of Krakow has requested that the two officers who were injured while stopping the attacker be awarded honorary citizenship of the city. Main Market Square reopened on Sunday evening after a security cordon was lifted.