Brent police raided an illegal rave in Wembley in the early hours of Sunday morning, seizing sound systems and shutting down the party.
Officers swooped on the property in Wembley High Road shortly before 1.30am.
Pictures show police vans lining the street near the property
Police said the occupants of the building engaged with officers and there were no reports of disorder.
No arrests were made.
Brent police tweeted just before 3am: “Officers are currently on scene at an unauthorised event High Street, Wembley.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here