Jeff Bezos

Updated 11:30 p.m. ET

Twitter says it was the victim of a "coordinated social engineering attack" by unspecified individuals who targeted Twitter employees with access to sensitive internal administrative systems.

The breach implicated the accounts of some of the richest and most famous people on the social media platform, including Jeff Bezos, Elon Musk, Bill Gates, former President Barack Obama, Joe Biden, Kanye West and others.

Amazon founder and CEO Jeff Bezos became an even richer man on Thursday morning, when a sudden surge in Amazon stock made him $1.5 billion overnight. His fortune grew to over $90 billion.

For several hours, Bezos was the richest person on earth — surpassing Microsoft founder Bill Gates. The top billionaire title has previously been claimed by Mexican telecom titan Carlos Slim, Spanish fast-fashion giant Amancio Ortega and investor Warren Buffett — though most of the time, it's firmly in Gates' possession.