A man has been arrested in connection with the death of former Radio 1 breakfast DJ Kevin Greening, police said.
The man, in his 50s, was arrested at the address in Wandsworth, south London, where Greening's body was found on Saturday night, the Metropolitan Police said.
He was questioned on suspicion of possession with intent to supply Class A drugs and has been bailed pending further inquiries.
A force spokeswoman said the death was being treated as "unexplained".
She said: "A post-mortem at St George's Hospital mortuary did not establish a formal cause of death and we await the results of further tests.
"An inquest will open and adjourn in due course.
"A man in his 50s was arrested at the scene in connection with the death on suspicion of possession with intent to supply Class A drugs, and has subsequently been bailed to return in March pending further inquiries."
The case is being investigated by detectives from the Specialist Crime Directorate, under Detective Chief Inspector Nick Scola.
Greening's agent, Chris North, announced the death, telling the BBC the DJ died peacefully in his sleep.
