Two teenagers were stabbed after a large group of youths, some armed with machetes and knives, reportedly gatecrashed a 16th birthday party at a school hall in east London.
Fighting broke out at around 9pm on Saturday after the gang turned up at the party at Elm Park Primary School, according to reports.
A 16-year-old boy and a 19-year-old man suffered suspected knife injuries and were rushed to hospital, the Met Police said.
It is understood their injuries are not life-changing nor life-threatening and both victims continue to assist police with their enquiries.
One neighbour told the Havering Daily: “It was total chaos. We saw between 40 to 50 youths, running through the streets.
“We think they had knives as they were seen dropping weapons in people's driveways and running away.
“They were attacking the police and there were so many of them that the police had to just disperse them. We couldn't believe what we saw.”
Footage from the incident appears to show a large group of children fleeing a school hall screaming, as an individual at the back of the room can be seen raising a weapon above their heads.
The Met Police said officers were called shortly after 9pm to reports of a fight involving a group on Calbourne Avenue.
Officers engaged with a group of teenagers who then became aggressive toward them, the force said.
Three teenagers were arrested at the scene on suspicion of assault on emergency workers and taken to an east London police station.
The Met said they were bailed to return for questioning later on Monday.
Meanwhile, the officers were treated at the scene by medics from the London Ambulance Service and did not require hospital treatment.
An investigation into the circumstances of the incident is ongoing.
