US President Donald Trump’s former national security adviser has accused the White House of taking control of his personal Twitter account

John Bolton says he now has access to his personal account after the White House had blocked his access to it, posting his first tweets since resigning in September.

“We have now liberated the Twitter account, previously suppressed unfairly in the aftermath of my resignation as National Security Advisor,” John Bolton tweeted to his more than 790,000 followers on Friday (local time).

We have now liberated the Twitter account, previously suppressed unfairly in the aftermath of my resignation as National Security Advisor. More to come…..

— John Bolton (@AmbJohnBolton) November 22, 2019

“In full disclosure, the @WhiteHouse never returned access to my Twitter account. Thank you to @twitter for standing by their community standards and rightfully returning control of my account,” he wrote.

Mr Bolton did not explain how the White House had blocked his access to the account, but asked in the post if it had been done “out of fear of what I may say?”

A senior administration official said the White House did not block Mr Bolton from accessing his personal Twitter account, “and wouldn’t have the technical means to do so”.

Twitter did not immediately respond to a request for comment.

Mr Bolton is among various US officials described as being alarmed at Mr Trump’s controversial use of his personal lawyer Rudy Giuliani on Ukraine policy, which is under intense scrutiny as part of a Democratic-led impeachment inquiry.

Former White House Russia expert Fiona Hill recalled in her testimony at public impeachment hearings on Thursday that Bolton had called Mr Giuliani “a hand grenade who’s going to blow everybody up”.

-with AAP