A lockdown has been lifted at Overbrook High School after a teacher reported hearing a gunshot, according to media reports.
The school was placed on lockdown around 9:30 a.m.
According to NBC10, a teacher claimed to hear a shot, while a student reported seeing a classmate with a gun run away from the school on Lancaster Avenue.
Police found no evidence of gunshots, and the lockdown was lifted around 10:20 a.m., 6ABC reports.