警方调查了匹兹堡Joe's Crab Shack的枪击事件，窗户受损，但没有发现受伤或嫌疑人。 Police investigate shooting at Joe's Crab Shack in Pittsburgh, with damage to windows but no injuries or suspects found.

警方正在调查周二在匹兹堡车站广场的Joe's Crab Shack发生的枪击事件。 Police are investigating a shooting incident at Joe's Crab Shack in Pittsburgh's Station Square on Tuesday. 员工听到砰砰声，发现后窗损坏，地上有一颗子弹碎片。 Employees heard a popping sound and found damage to the back windows, with a bullet fragment on the ground. 没有人受伤，调查正在进行中，没有任何嫌疑人或逮捕。 No one was injured, and the investigation is ongoing without any suspects or arrests. 警方认为，子弹可能在击中窗户之前从金属物体上弹开。 The police believe the bullet could have ricocheted off a metal object before hitting the window.