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.
Pakistan's former central bank head Shamshad Akhtar dies at 71
Shamshad Akhtar, the first and only woman to lead Pakistan's central bank and a two-time caretaker finance minister, died at 71, the finance ministry said on Saturday.
Thailand and Cambodia sign truce to halt fierce border conflict
Thailand and Cambodia agreed on Saturday to halt weeks of fierce border clashes, the worst fighting in years between the Southeast Asian countries that has included fighter jets sorties, exchange of rocket fire and artillery barrages.
Winter storm bears down on US Northeast, disrupting airline travel
A winter storm packing a frosty mix of snow and ice bore down on the US Northeast early on Saturday, disrupting post-holiday weekend airline traffic and prompting officials in New York and New Jersey to issue weather emergency declarations.
Russian drones, missiles pound Ukraine ahead of Zelenskyy-Trump meeting
Russia attacked Kyiv and other parts of Ukraine with hundreds of missiles and drones on Saturday, ahead of what President Volodymyr Zelenskyy said would be a crucial meeting with US President Donald Trump to work out a deal to end nearly four years of war.
World's longest expressway tunnel opens in China
The 22.13-km Tianshan Shengli Tunnel, the world's longest expressway tunnel, officially opened to traffic, Xinhua News Agency reported.
