Danish police believe a shopping mall shooting that left three people dead and four others seriously wounded was not terror-related, and said Monday that the gunman acted alone and appears to have selected his victims at random.

Copenhagen chief police inspector Soren Thomassen said the victims — a 17-year-old boy and a 17-year-old girl, both Danes, and a 47-year-old Russian man — were killed when the gunman opened fire on Sunday afternoon in the Field’s shopping mall, one of Scandinavia’s biggest.

Four other people were treated for gunshot wounds — two Danish and two Swedish citizens — and were in critical but