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.
US leaves Iran peace talks without a deal
US Vice President JD Vance said on Sunday that his negotiating team was leaving Pakistan after not reaching a deal with Iran following 21 hours of negotiations, jeopardizing a fragile two-week ceasefire.
At least 30 dead in stampede at Haiti’s historic Laferriere Citadel
At least 30 people were killed on Saturday in a stampede at the Laferriere Citadel in the northern countryside of Haiti, authorities said, warning that the death toll could rise.
Cyclone lashes New Zealand's North Island, hundreds evacuated
A cyclone battered New Zealand's North Island on Sunday, cutting power to thousands of residents and forcing hundreds to evacuate, as officials warned conditions would worsen through the day.
US-Iran talks pause for now, disagreements remain
Negotiations between the United States and Iran appeared to have concluded for now, Iran's government has announced early on Sunday, after a series of talks in Pakistan to end the six-week war between Washington and Tehran.
Costa Rica receives first group of deported migrants under agreement with US
Costa Rica on Saturday has received the first group of migrants from other countries deported from the United States under an agreement signed in March between the two countries, local authorities said.
