Witnesses have been left reeling after two boys were stabbed at a school in north-west London.

The youngsters, aged 12 and 13, were left seriously injured in the incident at Kingsbury High School in Brent, with police officers and counter terror cops rushing to the scene at around 12.40pm on Tuesday. The Met Police has since said the incident is not being treated as terror related.

Witnesses have revealed their shock, with reports that the suspect allegedly stabbed one of the boys in the neck.

"He [the attacker] came into the school and my son saw him stab a child in the neck," the father of one pupil said. "Two boys were on the floor and the other children thought they were just playing. But then they didn't get up."

Local Maeve O'Callaghan-Harrington said she heard children crying as they left school with their parents: "I walked outside and heard one boy saying, 'Mummy, Mummy, it was in his neck'."

Police were called to the scene at Kingsbury High School in Bacon Lane at 12.40pm on Tuesday to reports that a 13-year-old boy was stabbed.

Detective Chief Superintendent Luke Williams said: "The suspect - who we believe to be 13 - left the scene following the stabbing. After urgent enquiries our officers arrested him and also recovered a weapon which we believe to have been used in the stabbing."

THIS LIVE BLOG HAS NOW CLOSED.

Visit express.co.uk for live updates.