Penistone Grammar School says there is no ongoing threat after a precautionary lockdown on Friday morning.
The school says an unauthorised adult was reported on the site at around 8.30am and officers worked with senior staff to search the premises. Normal operations resumed once police and school leaders were satisfied it was safe.
The school says no weapons were involved and there were no direct threats towards pupils or staff.
Source information
Source: Barnsley Essentials newsdesk
