Singer and X Factor judge Tulisa has been arrested over supposedly supplying an undercover reporter with class A drugs.

Police also arrested a 35 year old man in relation to the same offence and confirmed they had "received information concerning the alleged supply of illegal drugs at a central London location".

Her arrest comes after one tabloid reported that Tulisa had acted as a middleman, introducing a journalist to a drug dealer.

She reportedly claimed: "Half my phone book sells it. Of course I can get it for you. Half the guys I know are drug dealers."

The reporter, acting for The Sun is said to have been able to purchase an ounce of cocaine that took place in the Dorchester Hotel in London.

Tulisa has yet to comment about her arrest and remains in custody in central London.