Ahead of OpenAI CEO Sam Altman’s four days in exile, several staff researchers wrote a letter to the board of directors warning of a powerful artificial intelligence discovery that they said could threaten humanity, two people familiar with the matter told Reuters.

Kraken, one of the world's largest cryptocurrency exchanges, was sued on Monday by the U.S. Securities and Exchange Commission, which accused it of illegally operating as a securities exchange without first registering with the regulator.

While it is known that FTX moved customer funds to Sam Bankman-Fried's Alameda trading desk, the missing funds are reported here for the first time. The financial hole was revealed in records that 'SBF' shared with other senior executives a week ago.