Police officers were attacked with bricks and bottles when they shut down an illegal rave in north London.
Partygoers threw objects at riot police in Finsbury Park on Friday night, leaving two officers injured.
In total two people were arrested when authorities attended the Woodberry Down Estate after receiving noise and anti-social behaviour complaints.
Videos from the scene showed riot police dispersing people from the area and a police helicopter was also spotted overhead.
The Met Police said the crowd became hostile when they arrived in Finsbury Park.
They said in a statement: “Items including canisters, bottles and a bicycle were thrown at police.
“Two officers suffered injuries. One was taken to hospital having sustained bruising to his ribs.
“He has since been discharged. The other officer sustained a leg injury but was able complete the remainder of his duty.
“Two males, aged 18 and 19, were arrested; one for violent disorder and obstruction and the latter for obstruction. They remain in custody.”
DAC Lucy D'Orsi added: “The violence and disorder they encountered is totally unacceptable as is the fear I am sure this generates amongst the local community, who called the police for help.
“In this case the irresponsible actions of the organiser led to injuries to our officers.
“Under no circumstance will policing accept this particularly after we had appealed for such events not to take place.
She said the Met Police had seen an increase in unlicensed music events and called them irresponsible in terms of posing an increased risk of COVID-19 transmission.
DAC Lucy D'Orsi said: “We are already reviewing CCTV footage and officers’ body worn footage to bring those who committed offences to justice.
“Officers will continue to patrol this weekend in increased numbers to keep communities safe.”