POLICE have confirmed that they are investigating reports that a gun was taken into Kirk Balk Academy by a pupil yesterday.
Officers say they received the information from a third party.
A spokesperson said: "While this is not a confirmed sighting of a firearm at this time, South Yorkshire Police takes reports of this nature incredibly seriously and a robust investigation is now underway to ensure that we quickly identify anyone that may have been involved.
"We do not tolerate the possession and/or use of firearms or other weapons and if a crime has been committed, this investigation will deal appropriately with anyone responsible and will take the necessary action to remove any weapons.
"If anyone knows anything about this matter and can help officers with their investigation, please contact police as a matter of urgency.
"You can call 101 or email email@example.com quoting incident number 984 of 7 March 2017."
Kirk Balk Academy told parents this morning that it was safe to take their children into school - however some parents kept their kids at home due to concerns over the incident.