Manchester City's midfielder Samir Nasri, who is on loan at Sevilla this season, apologised on Wednesday after posts with sexual content were tweeted on his personal account and stressed that it had been hacked.
It all started after Nasri travelled to Los Angeles to visit a clinic for medical treatment.
The tweets suggested that the United States medical centre 'provides sexual services' and urged followers to ask for such services whenever they visit. These posts were deleted later.
According to the tweets, a nurse went to Nasri's room to give him some vitamins as his girlfriend left, and then allegedly 'provided sexual services.'
After removing the hacked posts, the Frenchman wrote: "My account got hacked sorry about what happened earlier."
However, the French midfielder is now also under investigation by the Spanish Anti-Doping Agency, after being named by the Los Angeles clinic as a recipient of a intravenous vitamin treatment.
"Following the publication of this information, the agency launched an investigation to find out what the treatment is," a source from the AEPSAD agency told AFP on condition of anonymity.
"The presence of a sportsman in a clinic like this is suspicious as such."
The probe was initiated after the Los Angeles-based Drip Doctors clinic tweeted that it had treated Nasri, saying its Immunity Drip IV would allow the French player to stay hydrated and on top form throughout the tough season.
Drip Doctors say they specialise in not only intravenous vitamin therapy and hydration, but also anti-aging and cosmetic enhancements.
The drip treatement Nasri allegedly received includes vitamins C and B, amino acid lysine and zinc, all combined with "specially formulated nutrients to help combat superbugs and common viruses".
The Spanish Anti-Doping Agency was in contact with "all parties", the source said.
Below are the tweets that were posted after Nasri's account got hacked:
With inputs from agencies
Updated Date: Dec 29, 2016 11:35:16 IST