Iconic monuments and landmarks have been lit up in red, white and blue as the world stands shoulder-to-shoulder with Manchester after the terror atrocity, including a shutdown of the lights on the Eiffel Tower in Paris, reports The Manchester Evening News.
The poignant gesture echoes global responses to past terror attacks in Paris, Nice, Berlin, Brussels and Stockholm.
Belfast City Hall was lit up in the colours of the union flag in a public show of support to Manchester.
The towering HSBC building in Hong Kong featured a message in support of the 22 victims - ‘We stand with the United Kingdom’.
A book of condolence was also opened at the British Consulate in Hong Kong.
The Eiffel Tower in Paris, France, is expected to turn off its lights in solidarity with Manchester and the victims at midnight on Tuesday.
Elsewhere, similar tributes were staged in the United Arab Emirates and Toronto, Canada. Images circulating on social media showed the Story Bridge in Brisbane, Australia, lit up in red, white and blue.
Manchester itself has been quick to offer support in a similar fashion for other countries - and London following the Westminster attacks in March.
The town hall was lit up in the colours of Belgium in March 2016 in response to the Brussels terrorist attacks, which claimed 34 lives and left more than 200 people injured.