Binance, the world's biggest crypto exchange, has been hit by a $6.3bn (£4.7bn) hack - thought to be the biggest in history.
Half of the assets have been frozen but many remain in the hands of the hackers, the cryptocurrency giant said. It later added that it has "begun recovering" some funds.
Two analytics firms have attributed the incident to a North Korean hacking unit, though no one has claimed responsibility. Binance did not directly respond to questions about the incident's potential links to North Korea.
BBC cyber correspondent Joe Tidy explains more about the hack and what to do if you are affected.
Key Developments
What we know about Binance's $6.3bn hack. Video, 00:00:59What we know about Binance's $6.3bn hack
Up Next. Watch: Hundreds queue for city's new Lego store. Video, 00:00:15Watch: Hundreds queue for city's new Lego store
Chancellor says government has 'moral duty' to help young people out of work. Video, 00:01:06Chancellor says government has 'moral duty' to help young people out of work
Sir Patrick Stewart: The life of an iconic actor. Video, 00:03:01Sir Patrick Stewart: The life of an iconic actor
Watch: What leaked audio reveals about Spain train crash. Video, 00:00:53Watch: What leaked audio reveals about Spain train crash
Watch: VHS tapes and computers handed to police as Thomas Markle is investigated. Video, 00:01:28Watch: VHS tapes and computers handed to police as Thomas Markle is investigated
Watch: Bull on the loose at M6 service station. Video, 00:01:31Watch: Bull on the loose at M6 service station
Watch: King dances in the streets of the Bahamas capital. Video, 00:00:21Watch: King dances in the streets of the Bahamas capital
What we know as Flávio Bolsonaro lands in US after Brazil election loss. Video, 00:01:28What we know as Flávio Bolsonaro lands in US after Brazil election loss
Watch: At the scene of Spain's deadly train crash. Video, 00:00:52Watch: At the scene of Spain's deadly train crash
Israel's election result is messy - here's why. Video, 00:00:56Israel's election result is messy - here's why
What we know about Ukraine-Russia truce in Oleshky, brokered by Melania Trump. Video, 00:01:16What we know about Ukraine-Russia truce in Oleshky, brokered by Melania Trump
'A dream come true' - Harry Kane on his Ballon d'Or win. Video, 00:01:17'A dream come true' - Harry Kane on his Ballon d'Or win
What does Israel's election mean for Gaza and the wider world? Video, 00:01:03What does Israel's election mean for Gaza and the wider world?
