Detectives have searched a recording studio where model Kate Moss is alleged to have snorted cocaine, Scotland Yard has confirmed.
Moss is reported to have checked into rehab in Arizona
Police visited the west London studio on Thursday but a spokeswoman declined to elaborate on details of the search.
Officers are also examining items handed to them by the Daily Mirror, which first reported the claims.
The model's agent has said she was "absolutely devastated" by the recent drug-taking allegations.
Moss released a statement after the claims were reported, admitting "full responsibility" for her actions and saying she was taking steps to address her problems.
It has been reported that the 31-year-old would check into the Meadows rehab clinic in Arizona.
The police spokeswoman said: "We can confirm that officers from the specialist crime directorate executed a section eight search warrant on 29 September at an address in London, W4, as part of an ongoing inquiry."
The model has lost lucrative contracts with Chanel, H&M and Burberry after the Mirror first reported the claims about drug taking.
An investigation into those allegations was ordered personally by Scotland Yard chief Sir Ian Blair.