Pupils were ushered onto playing fields at around 11am, a parent of one of the students told the Rutland and Stamford Mercury. Inspector Gary Stewart, of Lincolnshire Police, said: “We are responding to an incident at the school and have a number of officers at the scene.”
Heart news east tweeted: “ #Lincolnshire Police currently attending #Bourne Grammar School after a suspicious phone call received by the school.
“As a precautionary measure the building has been evacuated and all pupils and staff have been moved to safety and the public should stay away.”
MORE TO FOLLOW.