Police have acharged a 22-year-old man with firearms offences after an incident in Mayfield Road, Bury St Edmunds, yesterday.
Police have sealed off parts of Mayfield Road and are searching the area.
Schoolchildren from Hardwick Middle School and South Lee School left for home via different exitsa and armed response officers and police dogs are at the scene.
Police have entered a property in Mayfield Road and the hazardous response team is on site.
Police say they were called after a resident was visited by a man who threatened him and had what appeared to be a handgun. The man left his home safely and the matter was reported to police.
Police say initial reports were that the matter appeared to be a neighbourly dispute.