The High Court granted the data watchdog a warrant after claims that the company amassed information about millions of people without consent. "As you will expect, we will now need to collect, assess and consider the evidence before coming to any conclusions".
The scandal over the way Cambridge Analytica obtained personal information to try to manipulate USA voters "is the most important moment that Facebook has faced since it went public (in 2012)", according to Professor Andrew Przybylski of Oxford University, one of the world's leading authorities on social media psychology.
According to media reports, Facebook learned of the fact that Cambridge Analytica had access to the personal information of the social network's users, after which it demanded that the data analysis firm delete the acquired information.
Cambridge Analytica, a London-based data marketing firm, has breached private information rules.
Investigators left Cambridge Analytica's London office about 3 a.m. Saturday.
Prasad also triggered a political war of words when he accused the main Opposition Congress party of having links with Cambridge Analytica, the Facebook associate under the scanner.
Bomb blast misses Egypt's Alexandria security director; one policeman killed
Attacks in recent years were claimed by Islamic State in a targeted campaign against security forces and civilians. Five other people wounded in the blast were being treated in the city's military hospital, the official said.
The ministry has threatened to take legal action against companies and individuals engaging in any unauthorised use of such data.
Meanwhile, Facebook founder Mark Zuckerberg has been forced to issue a statement outlining his firm's role in the scandal and apologised Wednesday to its billions of users for the breach.
But in 2014, it wound up in the hands of Cambridge Analytica, which was working to develop techniques that could be used to influence voters and was later hired by Trump's campaign. "It had nothing to do with us", Banks was quoted as saying.
Cambridge Analytica has said it is willing to cooperate with the ICO in the probe. A whistleblower detailed how users' data was illegally acquired and used to build profiles of American voters ahead of the 2016 United States presidential election.
He continued, noting that "we did not use any GSR data in the work we did in the 2016 USA presidential election".