The Metropolitan Police have confirmed the France international has been arrested, along with three other men, and is currently in custody in west London.
The 26-year-old forward is alleged to have raped a 34-year-old woman in west London on May 6.
A 23-year-old man and 22-year-old man were also arrested in connection with the incident at an address in Fulham on Wednesday morning.
A Metropolitan Police spokesman told Goal: “Officers from Sapphire are investigating an allegation of rape which happened on 6 May in the west London area.
"The allegation was passed on to the MPS by Kent Police on 8 May after the 34-year-old female victim reported it to them on the previous day, 7 May. The victim alleges she was raped by three men.
"On the morning of Wednesday, 15 May three men, [A] aged 26; [B] aged 23; [C] 22 yrs, were arrested at an address in Fulham on suspicion of rape - they remain in custody at a west London police station."
QPR was unavailable to comment when contacted by Goal.