Twitter CEO Jack Dorsey

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.