UK investigators enter Cambridge Analytica offices in London

Investigators from Britain’s data watchdog on Friday entered the London offices of a data analytics firm at the centre of a storm over allegations it improperly harvested Facebook data to target U.S. voters, a Reuters witness said.

About 20 officials, wearing black jackets with “ICO Enforcement” on them, arrived at the central London offices of Cambridge Analytica, soon after a High Court judge granted a search warrant sought by the Information Commissioner’s Office (ICO).

The officials, who were let into the building by security guards, brought crates with them, the Reuters witness said.

Elizabeth Denham, head of the ICO, sought the warrant after a whistleblower revealed Cambridge Analytica had harvested the private information of millions of Facebook users to support Donald Trump’s 2016 U.S. presidential campaign. Britain is investigating whether Facebook, the world’s largest social media network, did enough to protect data.