Three men were arrested after a fight broke out the morning after a house party.
Police were called to the Rufford Tower, Lexden Road, Acton, on Saturday morning after reports of a loud disturbance coming from the flats.
A helicopter circled the tower and dozens of police waited in the tower block grounds.
A 29-year-old man and a 31-year-old man were found fighting outside the flat on the thirteenth floor at 9:45am.
The 29-year-old from West Ealing was taken to Central Middlesex Hospital with a cut lip but he refused treatment and the 31-year-old from Acton was later arrested on suspicion of causing affray.
During the disturbance, a third man aged 22, from Kensington and Chelsea was also arrested for obstructing police officers.
A woman who lives in Acton and who witnessed the incident said: "There was a helicopter and police everywhere.
"I thought something bad had happened as it looked serious."
Police said an argument took place following a house party on Friday and the three men had been drinking on Saturday morning.
All three men have been bailed until October 11 pending further inquiries and CPS advice.