QPR have suspended assistant manager Richard Hill "until further notice" following the brawl during a training match against China's Olympic team.
China player Zheng Tao suffered a broken jaw during the incident at QPR's training ground on 7 February.
The Football Association is also investigating and is "in ongoing communication with the police".
QPR chairman Gianni Paladini has hinted that he could sack some of the players involved in the fight.
Seven members of the Chinese team have been sent home and the Chinese Football Association has launched its own inquiry.
"We will investigate the incident and strictly punish those responsible," said CFA spokesman Dong Hua.
"Under no circumstances do we have any tolerance for such behaviour."