It follows reports that President Trump was outraged by comments made by Mulvaney during the Ukraine corruption saga.
The allegations of abuse of power over the Ukraine incident led to impeachment proceedings against President Trump.
Mulvaney's departure has been on the cards for the last few weeks.
Mr Mulvaney is to become US special envoy to Northern Ireland, while North Carolina lawmaker Mark Meadows has been appointed to take over his former position.
Landslide at Guinea landfill kills 30, government says
A landslide at a landfill in Guinea's capital has killed 30 people, the government said on Sunday, after heavy rains overnight prompted the collapse of a massive mound of waste that engulfed nearby tents and shacks.
Ukraine wants peace but won't give in, Zelenskyy says on Independence Day
Ukraine wants peace but will not just give in to Russia at any price, President Volodymyr Zelenskyy said on Monday in a defiant speech marking Independence Day celebrations.
New Zealand to introduce bill banning social media for children under 16
New Zealand's coalition government will introduce a bill in parliament on Monday that seeks to ban children under 16 from using social media, and proposes fines of up to 10 per cent of a platform's global revenue for non-compliance.
Ukrainian drone attack kills three in Russia's Krasnodar, officials say
Three teenagers were killed and another eight people, including seven children, were wounded after drone debris hit a private childcare centre in southern Russia's Krasnodar region overnight, Russian officials said.
Coach carrying German high-school students crashes in Netherlands
A coach carrying high-school students from Germany crashed in the east of the Netherlands early on Monday, injuring eight people, who were taken to hospital, Dutch police said.
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UAE President Sheikh Mohamed Bin Zayed Al Nahyan’s visit to the US to boost economic and technology ties including AI.
Apple Inc. shares fell Monday after a closely followed analyst warned that demand for the firm’s new iPhone 16 Pro model has been lower than expected. Is this a sign that the AI software just isn’t ready?
Does working from home kill productivity or can it benefit staff by giving them more flexibility and a better work/life balance?
Dubai’s current population is more than double compared to almost twenty years ago, which now stands at 3.7 million. Lots of families are also moving to the UAE now. So what does it mean for the property market?
Glory Ehirim Nkiruka is Noon’s first ever female delivery driver. In her first ever interview, she explained why she loves her job, despite the heat!
