Pakistan, June 16 -- Police said the violence started after an argument between two groups. As officers tried to break up the fight, a 16-year-old male pulled out a gun and opened fire on the other group.

Among those killed was a 41-year-old woman who was a bystander, and an 18-year-old man involved in the dispute. The police returned fire but did not hit the suspect. The teenager was later taken into custody.

The two teenagers who were wounded, a boy and a girl, were shot in their arms. It remains unclear if they were part of the groups involved in the fight, authorities said.

This shooting adds to the alarming rise in mass shootings in the United States. According to the Gun Violence Archive, there have been 156 mass shootings this y...