By Daniel White
Updated: July 15, 2016 2:55 AM ET

The world reacted Thursday to the news of an attack in Nice, France, that left at least 84 people dead, 18 in critical condition and injured scores.

Many took to Twitter to express their condolences, including celebrities, politicians and general well-wishers.

French President François Hollande, who held a press conference in the aftermath of the attack early Friday morning local time, tweeted: “France is afflicted but I assure you she is strong and she will always be stronger than the fanatics that want to strike her today,” according to a translation provided by the Guardian.

President Barack Obama released a statement condemning the attack, saying that the White House would be in touch with French officials to offer assistance.

Presumptive Republican presidential nominee Donald Trump responded to the tragedy online, calling the incident “horrific” and later cancelling a planned news conference where he was expected to announce his pick for a running mate.

Prime Minister Justin Trudeau expressed his support and condolences for France on behalf of all Canadians.

Singer Lady Gaga posted a tribute in solidarity with France and its people.

Twitter users used the hashtag #PrayForNice to express their condolences for those lost in Nice after a truck slammed into a crowd of people celebrating Bastille Day.

Contact us at editors@time.com.

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