US Secretary of State Mike Pompeo has been subpoenaed.
A Democratic-led US House of Representatives committee issued the order on Friday.
They want to him to hand over documents regarding contact the US government had with the Ukrainian government.
Earlier this week House Speaker Nancy Pelosi launched a congressional impeachment inquiry of US President Donald Trump.
Lebanese return home as ceasefire with Israel mostly holds
People uprooted by the war in Lebanon began returning to devastated towns and neighbourhoods on Friday, with many finding their homes destroyed or uninhabitable and hesitant to stay for fear a ceasefire between Hezbollah and Israel could unravel.
Myanmar cuts ex-leader Aung San Suu Kyi's sentence, frees former president
Myanmar has reduced the sentence of imprisoned ex-leader Aung San Suu Kyi, her lawyer told Reuters on Friday, as part of an amnesty by a new president who ousted her government in a coup five years ago.
US military: ready to strike Iran's power plants, energy industry if ordered
The US naval blockade of Iran is just an example of 'polite' behaviour during the ongoing ceasefire and US forces are ready to strike Iran's power plants and energy industry if ordered, Pentagon chief Pete Hegseth said on Thursday.
GCC parliamentary speakers stress unified stance against Iranian attacks
Speakers of the legislative councils of the Gulf Cooperation Council have stressed the importance of adopting a unified Gulf position and working toward resolutions at the Inter-Parliamentary Union condemning recent Iranian attacks on GCC states.
Countries to discuss Hormuz mission for when conflict ends
France and Britain will chair a meeting on Friday of around 40 countries aimed at signalling to the United States that some of its closest allies are ready to play a role in restoring freedom of navigation in the Strait of Hormuz once conditions allow.
