A 10-year-old boy has been arrested over an alleged attack on two women teachers.
One of the victims - who were both in their 50s - suffered a broken leg and suspected dislocated kneecap and the other sustained a facial injury, Scotland Yard said.
Both women were taken by ambulance to a nearby hospital following the alleged incident in Orpington, south-east London.
Police were called to the school in Avalon Road at 1pm on Thursday to reports that a pupil had assaulted two teachers.
A Scotland Yard spokesman said: "A 10-year-old boy was arrested at the scene on suspicion of grievous bodily harm and was taken to a south-east London police station.
"He has been bailed to return on a date in mid-February."