John Bolton has been called in to testify in the impeachment inquiry into US President Donald Trump.
The former National Security Adviser has been summoned by the House of Representatives investigators.
The US President is being investigated for pressuring Ukraine to investigate former US Vice-President Joe Biden and his son.
Trump denies the claims.
Bolton, who has spoken against the president on the matter, has been asked to testify on November 7.
Trump says Iran has asked for a ceasefire, US wants to see Hormuz open first
Iran has asked the United States for a ceasefire, President Donald Trump said in a Truth Social post on Wednesday, adding Washington would consider this once the Strait of Hormuz was open.
In historic first, Trump attends Supreme Court arguments
US President Donald Trump made a historic visit to the Supreme Court on Wednesday to attend arguments over the legality of a policy he considers crucial to his hardline approach toward immigration - a directive he signed last year on his first day back in office that would limit birthright citizenship.
15 deaths confirmed after measles outbreak in Bangladesh
A measles outbreak in Bangladesh has led to 15 confirmed deaths, officials said on Wednesday, as the government readies to launch an emergency immunisation programme as part of efforts to try to contain the disease.
Iranian missile strikes oil tanker in Qatar
Qatar's Ministry of Defence has announced that an oil tanker was struck by a cruise missile in its territorial waters on Wednesday, with no casualties reported.
Australia's Albanese says war's economic shock will be felt for months
Australian Prime Minister Anthony Albanese has warned the economic shocks of the war in the Middle East would be felt for months and encouraged citizens to take public transport in a rare address to the nation on Wednesday.
