Suffolk Police swarmed to Tremont Elementary School in Medford Thursday evening after receiving a 911 call reporting a "suspicious male" on the roof, police said.
A security guard at the school saw the man on the roof and attempted to speak with him, but he lost visual contact with the man when the guard went to a door to confront him, police said.
The guard did not know if the person was in the school or fled outside, police said. Approximately 30 children in an after-school program at Tremont at the time were moved to a secure area and a police officer stayed with the children, police said.
The children were not alarmed, according to police.
Police reviewed video and determined the man fled outside of the school and did not go inside.
A K-9 unit searched for the man, described as white and wearing a gray hooded sweatshirt, but did not find him, police said.
Following the Newtown shooting, the Patchogue-Medford Board of Education approved a measure to place security guards in all of the district's elementary schools.
Like our Facebook page here for the latest breaking news updates.