San Francisco: Facebook believes the data of up to 87 million people was improperly shared with the political consultancy Cambridge Analytica -- many more than previously disclosed.

The BBC has been told that about 1.1 million of them are UK-based.

The overall figure had been previously quoted as being 50 million by the whistleblower Christopher Wylie, BBC reported on Wednesday.

Facebook chief Mark Zuckerberg said "clearly we should have done more, and we will be going forward".

During a press conference he said that he had previously assumed that if Facebook gave people tools, it was largely their responsibility to decide how to use them.

But he added that it was "wrong in retrospect" to have had such a limited view.

"Today, given what we know... I think we understand that we need to take a broader view of our responsibility, that we're not just building tools, but that we need to take full responsibility for the outcomes of how people use those tools as well," he said.

Zuckerberg also announced an internal audit had uncovered a fresh problem. Malicious actors had been abusing a feature that let users search for one another by typing in email addresses or phone numbers into Facebook's search box.

As a result, many people's public profile information had been "scraped" and matched to the contact details, which had been obtained from elsewhere.

"It is reasonable to expect that if you had that (default) setting turned on, that in the last several years someone has probably accessed your public information in this way," Zuckerberg said.

The estimates of how many people's data had been exposed were revealed in a blog by the tech firm's chief technology officer, Mike Schroepfer.

BBC has also learned that Facebook now estimates that about 305,000 people had installed the This Is Your Digital Life quiz that had made the data-harvesting possible. The previously suggested figure had been 270,000.

About 97 per cent of the installations occurred within the US. However, just over 16 million of the total number of users affected are thought to be from other countries.

Facebook has faced intense criticism after it emerged that it had known for years that Cambridge Analytica had collected data from millions of its users, but had relied on the London-based firm to self-certify that it had deleted the information.

Cambridge Analytica said it had bought the information from the creator of the This Is Your Digital Life app without knowing that it had been obtained improperly.

During Zuckerberg's press conference, Cambridge Analytica tweeted it had only obtained data for 30 million individuals -- not 87 million -- from the app's creator, and again insisted it had deleted all records.

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Mangaluru: The Karnataka Pradesh Congress Committee (KPCC) has appointed Anwar Manila as the social media committee coordinator of the Dakshina Kannada District Non-Resident Indian (NRI) cell of the KPCC. The appointments were made through an order issued by KPCC President DK Shivakumar on Saturday.

In addition, the party has also appointed Vice President of non-resident Indians forum and All India Congress Committee’s Indian Overseas Congress (IOC) secretary in-charge Dr. Arati Krishna as the chairperson of the KPCC NRI Cell.

Anwar, a non-resident Kannadiga residing in Dubai for the past 18 years, has been an active member of the Congress party for a decade, particularly within its social media unit. He is also serving as the member of the social media unit of INCAS. In 2019, he served as a member of the publicity committee for the 150th birth anniversary of Mahatma Gandhi, attended by former AICC president Rahul Gandhi in the UAE.

Alongside, Anwar has also been actively serving in social, religious and educational fields and is also recognised by several non-resident Kannadiga organisations.