COPENHAGEN, Denmark—The Swedish government vowed on Tuesday to find the perpetrators of a drive-by shooting that killed a 12-year-old girl in what authorities said appears to be the latest violence from suburban feuds between criminal gangs fighting over territory.

Police work at the site where a 12-year-old girl was shot and killed near a petrol station in Botkyrka, south of Stockholm, Sweden, onAug. 2, 2020. (Naina Helén Jåma/TT via AP Photo)