Yahoo to notify its users about 'state-sponsored' hacking attacks

Announcement follows similar move by Facebook, as internet companies respond to attacks that can be 'more advanced and dangerous'

Yahoo has become the latest technology company to promise to alert its users if it thinks their accounts have been attacked by "state-sponsored actors" - hackers working on behalf of governments.

"Yahoo will now notify you if we strongly suspect that your account may have been targeted by a state-sponsored actor," said Bob Lord, Yahoo's chief information security officer, in a blog post announcing the change.