A gunman suspected of killing six people and injuring 16 others in the southern Polish city of Kraków on Saturday was “fascinated by far-right ideologies” and appears to have acted alone, Poland's interior minister has said. The remarks offered the first indication of a possible motive for the mass killing which shocked Poland, where such incidents are extremely rare. The suspect is a 25-year-old Polish national who drove a black Subaru car into Kraków's historic Main Market Square at around 3 p.m. and opened fire at random passersby, according to officials and police. Six people, including four women and two men, were killed, while 16 others were injured, including two police officers. 'Fascinated by far-right ideologies' Speaking at a news conference in Kraków, Interior Minister Marcin Kierwiński said all the indications were that the attacker “held very, very radical views” and was “fascinated by far-right ideologies.” "Police have no grounds to conclude that more than one person was responsible for this terrible massacre. It appears there was only one attacker," he added. The gunman was shot and detained following an exchange of fire with officers and taken to a hospital, where he underwent surgery. Camouflage clothing and bulletproof vest Regional police spokesperson Katarzyna Cisło said the attacker had been wearing camouflage clothing and a bulletproof vest and carrying a long, military-style gun. Police recovered several other firearms and a large quantity of ammunition from his vehicle, she added. Investigators were also carrying out inquiries at the suspect's home, Kierwiński said. Defense Minister Władysław Kosiniak-Kamysz denied claims that the attacker was a Polish soldier, saying he had never served in the armed forces or had any connection to the military.