A newspaper reported at the weekend that the former X Factor judge, 24, had acted as a go-between, hooking up a journalist with a supplier of the drug.
Half an ounce of cocaine changed hands at London’s Dorchester Hotel, it was alleged.
A Met Police spokesman said today: ‘Officers from Westminster have today, Tuesday June 4, arrested two people – a 35 year old man and a 24 year old woman – by appointment at a central London police station on suspicion of being concerned with the supply of Class A drugs. They remain in custody at a central London police station.
A spokesperson for Tulisa has declined to comment.