Shootings plague U.S. cities

Jaiden Brown and Mathew Steffy-Ross, both 17, died after multiple shooters opened fire at a party at an Airbnb rental house in Pittsburgh on Sunday. Roughly 31 of 200 attendees were injured, most of them minors. The police believe the shooters fired nearly 100 rounds. They have not announced any arrests or suspects yet.

What else happened over the weekend? Also Sunday, police responded to gunfire reports at a gas station in Portland, Ore. They found one man already dead and three boys with gunshot wounds. One is in critical condition. At least three shooters who likely knew each other injured nine people at a shopping mall in Columbia, S.C., on Sunday. Six others were injured trying to escape. None are in critical condition. A suspect has been arrested, but his lawyer said he fired in self-defense.

Dig deeper: From the archives, listen to Sarah Schweinsberg’s report about increasing violence in American cities on The World and Everything in It podcast.