According to this article by Vice, it was an employee who either got paid or hacked.
This allowed the hackers to intercept the 2fa and password reset token, allowing them to change the password and give themselves access to the accounts.
The latest official developments can be found on the official TwitterSupport account, as long as this one isn't compromised!
Twitter Support
@twittersupport
We detected what we believe to be a coordinated social engineering attack by people who successfully targeted some of our employees with access to internal systems and tools.
02:38 AM - 16 Jul 2020
2895
5067
For further actions, you may consider blocking this person and/or reporting abuse
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According to this article by Vice, it was an employee who either got paid or hacked.
This allowed the hackers to intercept the 2fa and password reset token, allowing them to change the password and give themselves access to the accounts.
The latest official developments can be found on the official TwitterSupport account, as long as this one isn't compromised!