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.
Nine injured in attack in Taipei, media reports
Nine people have been injured, four of them seriously, after a person released smoke bombs at a Taipei subway station and then attacked bystanders, the official Central News Agency said.
Putin offers no compromise on Ukraine, says EU 'robbery' failed
President Vladimir Putin offered no compromise on his terms for ending the war in Ukraine on Friday and accused the European Union of attempting "daylight robbery" of Russian assets.
Bangladesh rocked by unrest after death of student leader
Police and paramilitary troops fanned out across Dhaka and other cities in Bangladesh on Friday after violent protests overnight over the death of a popular youth leader, with concerns of further unrest ahead of national elections in which he was due to run.
Suspected gunman in Brown University shooting found dead
The suspect in the mass shooting at Brown University last weekend is dead, a US attorney said, as authorities investigate whether the same person killed a Massachusetts Institute of Technology professor two days after the rampage at Brown.
Ukraine's Zelenskyy meets Poland's Trump-backed president at key moment in war
Volodymyr Zelenskyy met Poland's MAGA-aligned President Karol Nawrocki in Warsaw on Friday as the Ukrainian leader tries to shore up relations with a key ally at a crucial moment for Kyiv's war effort.
