President Obama, Joe Biden, Elon Musk, and Bill Gates all had their accounts hijacked to peddle Bitcoin scams. Donald Trump, perhaps the most famous Twitter user of all, was untouched by the attack.

New York Times writes that Trump’s Twitter account has extra protection after’past incidents’. A senior White House official and a Twitter employee were also cited. Trump’s account returned to Twitter 11 minutes later.

The Wall Street Journal reported at the time that Twitter had already limited the number of employees who could access Trump’s account following his inauguration.

We have implemented safeguards to prevent this happening again. We wo n’t be able to share all details about our internal investigation or updates to our security measures.

The people involved in Wednesday’s attack were sharing screenshots of a Twitter admin tool apparently used for the attack. Twitter has said that its own employee systems and tools were compromised.