Nine dead in 3 mass shootings across United States

Shootings in three American cities killed nine people and wounded two dozen more on Saturday night and Sunday morning, the latest outbreaks of gun violence in the wake of three mass shootings that have rattled the United States.

In Philadelphia, a confrontation between two men escalated into a gunfight that sprayed bullets into a crowded bar and restaurant district, killing three people, wounding 12, and setting off panic as people tried to flee, police said.

Similarly, shooting broke out after...