the Metropolitan Police has said. Emergency services were called to Kingsbury High School in Brent, at 12:40 GMT on Tuesday, to find a 12-year-old and a 13-year-old had been attacked. Officers are continuing to question a 13-year-old boy who was arrested on suspicion of attempted murder, as counter terrorism officers lead the investigation. Det Ch Supt Luke Williams said due to "surrounding circumstances", the investigation was being led by counter terrorism officers. It has not been declared a terrorist incident. Speaking in the House of Commons, Prime Minister Sir Keir Starmer described the stabbing as an "appalling attack" and said his thoughts were with the two children, and all of those affected. "We thank the police for their rapid response. It's important now that we give them the space to pursue their investigation," he added.

BBC Home Affairs Correspondent Daniel Sandford said it was understood that some had heard the attacker saying words like "Allahu Akbar" - or similar - meaning "God is greatest" in Arabic, during the incident. There are reports that people may have been sprayed with a substance, although it is not believed to have been noxious. BBC London understands the suspect was wearing school uniform.

The suspect left the scene following the stabbing, but was later arrested and a weapon was recovered, police said. Det Ch Sup Helen Flanagan, of Counter Terrorism Policing London, said officers were conducting a "fast-paced investigation" and were continuing to make inquiries into the circumstances. Police are understood to be examining the suspect's devices and going through dozens of witness accounts. (BBC)