The Ukrainian gas company at the centre of President Donald Trump's impeachment was successfully hacked by Russian military agents in November,
US Attorney General William Barr has asked Apple to unlock two phones of a Saudi man who carried out a mass shooting at a US base.
A man has been rescued after surviving more than three weeks in the Alaskan wilderness with little food and shelter.
An emergency alert about an incident at a nuclear power plant in southern Canada was sent to mobile phones by mistake, officials say.
The US says it is "ready to engage without preconditions in serious negotiations" with Iran following the countries' exchange of hostilities.
US President Donald Trump and his would-be Democratic challenger Michael Bloomberg will air duelling Super Bowl ads, each costing about $10m (£7.6m).
New York Mayor Bill de Blasio has announced a series of measures to tackle a "crisis" of anti-Semitic attacks, following a mass stabbing.
Actress Sharon Stone says she was blocked from the dating app Bumble. The online platform said there had been several reports of a fake profile,
Republican Senator Lisa Murkowski has said she is "disturbed" by her party's stance before President Donald Trump's impeachment trial.
US presidential candidate Michael Bloomberg has said that his campaign "unknowingly" used prison workers to call voters on his behalf.
A radio host has lost his job after saying he would like "a nice school shooting" to interrupt the "never-ending" coverage of US President Donald Trump's impeachment.
President Donald Trump has lashed out over his impending impeachment in a letter to top Democrat Nancy Pelosi, accusing her of declaring "open war on American democracy".
Tornadoes have torn through several south-eastern states in the US, killing at least three people and injuring several others, officials say.
Donald Trump is expected to become only the third US president in history to be impeached on Wednesday for his actions with Ukraine
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