Tasnim � The Iranian parliament speaker�s special assistant for international affairs, Hossein Amir Abdollahian, said John Bolton�s removal from his post of US National Security Adviser is the outcome of deep division in the White House.

�Undoubtedly, the hawkish #Bolton's firing is the outcome of internal differences btw the White House & #Trump,� Amir Abdollahian said in a post on his Twitter account on Wednesday.

�What is important is the change in the US behavior, not replacement of persons & parties in America,� he added in his tweet.

Iranian Foreign Minister Mohammad Javad Zarif has always blamed Bolton for the US hawkish policies toward Iran and referred to him as a member of the B-Team.

The B-Team in Zarif�s comments refers to a group of four anti-Iran hawks, including Bolton, Israeli Prime Minister Benjamin Netanyahu, Saudi crown prince Mohammad Bin Salman Al Saud, and crown prince of Abu Dhabi Mohammed bin Zayed Al Nahyan.

US President Donald Trump, who said he had disagreed �strongly� with Bolton on policy, announced on Tuesday via Twitter: �I asked John for his resignation, which was given to me this morning.�

A replacement -- the White House�s fourth national security chief in less than three years -- would be named next week, Trump said.

Bolton, who had been scheduled to give a press conference at the White House on an unrelated matter, denied being fired and insisted that he had resigned.

The developments came against the backdrop of increased tensions between Iran and the US with Washington imposing new sanctions against the Islamic Republic.

The US has ratcheted up pressure on Iran since last year after withdrawing from the 2015 nuclear deal, known as the Joint Comprehensive Plan of Action (JCPOA).

Since then, the Trump administration has been trying to reduce Iran�s oil exports to �zero,� and has sent an aircraft carrier strike group, a bomber squad, an amphibious assault ship, and a Patriot missile battery to the Middle East to try to stack up pressure on Tehran.

Iranian officials, however, have dismissed such moves as psychological warfare, saying the country has its own ways of circumventing the American bans and selling crude oil.