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.
Six killed in Swiss bus blaze after person reportedly sets themselves on fire
At least six people have died, and three others were injured in a bus fire on Tuesday in a small town in western Switzerland, in what police said may have been a deliberate act following reports that a person on board set fire to themselves.
US says it destroyed mine-laying vessels as Trump warns Iran over strait
The US military says it "eliminated" 16 Iranian mine-laying vessels near the Strait of Hormuz on Tuesday in a statement by its Central Command, as President Donald Trump warned that any mines laid in the strait by Iran must be removed immediately.
Britain working with allies to support shipping through Strait of Hormuz
Britain is working with allies on a range of options to support commercial shipping through the Strait of Hormuz in the face of Iranian threats, Prime Minister Keir Starmer's spokesperson said on Tuesday as the U.S.-Israeli war with Iran roils oil prices.
Wildlife to replace humans on next series of UK banknotes
Images of animals will feature on the next series of banknotes from the Bank of England, as the central bank shifts away from historical figures such as William Shakespeare, Winston Churchill and Jane Austen over the coming years.
Five Iranian women's soccer players granted humanitarian visas in Australia
Australia on Tuesday granted humanitarian visas to five Iranian women soccer players after they sought asylum, fearing persecution on their return home for their refusal to sing the national anthem at an Asia Cup match.
Four people have been injured after two drones fell near Dubai International Airport (DXB) on Wednesday, the authorities announced, adding that air traffic continued without disruptions.
The UAE's air defence systems announced it is continuing to intercept incoming missile and drone threats from Iran on Wednesday.
The Roads and Transport Authority (RTA) and Dubai Police have extended the 24/7 truck movement permit until the evening of Sunday, March 22.
