Some Yahoo users close accounts amid fears breach could have ripple effects

More to come?: Cybersecurity experts warned the impact of the hack could reverberate throughout the Internet.

Many Yahoo users rushed on Friday to close their accounts and change passwords as experts warned that the fallout from one of the largest cyber breaches in history could spill beyond the Internet company's services.

After Yahoo disclosed on Thursday that hackers had stolen the encrypted passwords and personal details of more than 500 million accounts in 2014, thousands of users took to social media to express anger that it had taken the company two years to uncover the data breach.