A Philadelphia high school was put on lockdown for a short time on Friday after a person arrived at the campus with a gun, police said.
The incident occurred at the Kensington Urban High School located at 2051 E. Cumblerand St just before 10:30 a.m., officials said.
The gunman left school property soon after authorities learned of the weapon, authorities said.
No one was hurt.
Police are searching for the suspect.