Officers attempting to disperse crowds at an unlicensed music event have been attacked, police said.
Scotland Yard said objects have been thrown at officers dispersing the crowd at an event at Colville Gardens, Notting Hill.
It comes after “appalling scenes” of violence at a street party in Brixton on Wednesday evening.
Kensington and Chelsea Police tweeted: “Officers are at the scene of an unlicensed music event near Colville Gardens, £W11.
“Objects have been thrown at officers dispersing the crowd. Violence will not be tolerated units are responding appropriately.
“This gathering is illegal we ask anyone in attendance to leave.”