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Samir Nasri in doping probe after reports that he had intravenous treatment at a Los Angeles clinic

Sevilla have confirmed that Spain's anti-doping agency are investigating reports that Samir Nasri had intravenous treatment at a Los Angeles clinic.

The clinic, Drip Doctors, posted a photo of Nasri on its Facebook and Twitter accounts on Tuesday, saying it had provided him with a drip 'to help keep him hydrated and in top health during his busy soccer season'.

It describes the drip as an infusion to boost the immune system and contains 'high-dose vitamin C, B vitamins, lysine and zinc combined with specially formulated nutrients'.

A series of bizarre tweets  emanated from Samir Nasri's Twitter account on Tuesday night
A series of bizarre tweets emanated from Samir Nasri's Twitter account on Tuesday night
Sevilla have confirmed that Spain's anti-doping agency are investigating reports into Nasriu00a0
Sevilla have confirmed that Spain's anti-doping agency are investigating reports into Nasri

Intravenous treatments are banned by the World Anti-Doping Authority for measures over 50ml.