QPR have suspended assistant manager Richard Hill 'until further notice' following the brawl during last week's match against the China under-23 team.
China player Zheng Tao suffered a broken jaw during the incident, which the Football Association are investigating and are 'in ongoing communication with the police'.
A club statement, on their official website: 'Following the incident at the training ground on February 7, and the subsequent police investigation of the matter, Queens Park Rangers Football Club have suspended assistant manager Richard Hill from his duties until further notice.'
Police said a 43-year-old man was arrested on February 10 'on suspicion of ABH (actual bodily harm). He was later bailed to return to a west London police station pending further enquiries'.
The Metropolitan Police statement continued: 'Hillingdon Police are continuing to investigate a number of assaults following a disturbance amongst players at a match between QPR FC and the Chinese Olympic team.
'On arrival, police discovered a 21-year-old man suffering facial injuries. He was conveyed to Hillingdon Hospital where he was treated for a broken jaw. He was later discharged.
'Subsequent investigation has found a further two males suffering injuries. One with injuries amounting to ABH, the other suffering a fractured eye socket.
'All parties from both QPR and the Chinese team are assisting police.'
Rangers chairman Gianni Paladini said last week that there was ''no place for violence'' and that his club would work ''24 hours a day'' to find out what happened.
An FA spokesman said: 'We are in close communication with the police, and we are awaiting confirmation of whether or not they will be taking any action.
'We will then consider whether to take any disciplinary action of our own.'