Three people were killed and several wounded in a shooting at a Copenhagen mall on Sunday, Danish police said, adding that they had arrested one suspect, a 22-year-old Dane. The young man, who witnesses alleged was armed with a large rifle, was arrested peacefully shortly after police arrived at the large Fields shopping mall, located between the city centre and Copenhagen airport. “There are three dead and several injured, three of them in critical condition,” Copenhagen police chief inspector Soren Thomassen told a news conference. The motives of the suspect, described by police as a 22-year…