Five teenagers have been arrested and bailed in connection with the attack
Police were called at around 9pm on Saturday, 22 March, to reports of a fight involving a group at Elm Park Primary School.
Officers attended and engaged with a number of teenagers who became aggressive toward them.
A 16-year-old boy and a 19-year-old man were taken to hospital with suspected knife wounds. Their injuries were deemed neither life changing nor life-threatening.
Four officers were treated at the scene by London Ambulance Service medics, and did not require hospital treatment.
Three teenagers – a 14-year-old girl, a 16-year-old boy and a 17-year-old girl – were arrested at the scene on suspicion of assault on an emergency services worker and taken into custody.
They have since been bailed, pending further enquires.
Two others – a 15-year-old boy and a 17-year-old boy – were arrested in Hornchurch the following day on suspicion of possessing an offensive weapon.
They have also been bailed, pending further enquires.
A spokesperson for the Met Police says: “An investigation into the circumstances of the incident is ongoing.”
“In response to this incident, police patrols in the area are being stepped up at key times.
“We are working with our partners at Havering Council to understand what occurred, and to ensure that nothing like it occurs again.”