well, earlier this afternoon, the assistant chief constable, lindsay butterfield of south yorkshire policegave an update on their response to the situation. >> it is with great sadness that i share with you today. a teenager has died following a stabbing at a sheffield school early today. our thoughts are with the family of the boy, his friends and the whole school community. at 12:17 pm, emergency services were called to all saints catholic high school on granville road. the victim, a 15 year old boy, suffered serious injuries and despite the best efforts of the ambulance service, he sadly died ambulance service, he sadly died a short time later. a 15 year old boy has been arrested on suspicion of murder and remains in our custody at this time. >> well, this tragic incident occurred less than a week after the same school that the all saints catholic high school in sheffield previously went into lockdown with the headmaster, sean pinder, telling parents that it had issued a stay put nofice that it had issued a stay put notice after reports of threats of violence between pupils. >> and that