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 there will either be a deal with Iran or US will 'finish the job'
President Donald Trump has stated on Monday that the US would either reach a deal with Iran or "finish the job", renewing his threat of military action.
Storms kill at least eight in central China as Typhoon Bavi looms offshore
At least eight people have been killed after thunderstorms battered central China's Hubei Province, state media said on Tuesday, as forecasters warned of more torrential rain across various parts of the country that are home to around 200 million people.
Landslide in China's Gansu province traps 16
Sixteen people remain buried in a mountainous county in China's western province of Gansu after a landslide on Tuesday, according to state broadcaster CCTV.
Hamas dissolves Gaza government, Israel dismisses move as 'stunt'
Hamas has announced on Monday that it had dissolved its de facto government in Gaza and was ready to hand over to a group of Palestinian technocrats, a move it described as a step forward in a US-backed plan for the enclave, but Israel dismissed as a "stunt".
Death toll from Venezuela quakes rises to 3,535 as thousands remain displaced
The death toll from Venezuela's twin earthquakes has risen to 3,535, authorities said on Monday, while nearly 18,000 people remain homeless more than a week after the disaster struck the capital and nearby coastal areas.
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