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'One billion' affected by Yahoo hack 'One billion' affected by Yahoo hack
(35 minutes later)
Yahoo has said more than one billion user accounts may have been affected in a hacking attack dating back to 2013.Yahoo has said more than one billion user accounts may have been affected in a hacking attack dating back to 2013.
The US multinational technology company said an unauthorised third party had stolen the data, including names, emails, phone numbers and dates of birth. The internet giant said it appears separate from a breach disclosed in September, when Yahoo revealed some 500 million accounts were accessed in 2014.
It said it believed the incident was separate from its previously disclosed breach affecting 500 million users. Yahoo said names, phone numbers, passwords and email addresses were stolen, but not bank and payment data.
That hack took place in 2014 but was only made public in September. The company, which is being taken over by Verizon, said it is working closely with the police and authorities.
This breaking news story is being updated and more details will be published shortly. Please refresh the page for the fullest version. When Yahoo disclosed in September the 2014 data breach, the company said information had been "stolen by what we believe is a state-sponsored actor". Yahoo did not say which country it held responsible.
If you want to receive Breaking News alerts via email, or on a smartphone or tablet via the BBC News App then details on how to do so are available on this help page. You can also follow @BBCBreaking on Twitter to get the latest alerts. That breach included swathes of personal information, including names and emails, as well as "unencrypted security questions and answers".
The hack took place in 2014, and Yahoo has come under pressure to disclose why it took so long for the breach to be made public.
The new breach raises fresh questions about Verizon's $4.8n proposed acquisition of Yahoo, and whether the US mobile carrier will try to modify or abandon its bid.
If the hacks cause a user backlash against Yahoo, the company's services would not be as valuable to Verizon.
In a statement, Verizon said that it would evaluate the situation as Yahoo investigates and would review the "new development before reaching any final conclusions".
Yahoo said on Wednesday that users should change their passwords and security questions.