The world reacts to the attacks in Nice

Mourners gather near the scene where a massive truck carrying firearms plowed through a crowd of revelers on Thursday night in the southern city of Nice, where people were celebrating Bastille Day, a French national holiday.

The French flag hangs at half mast at the president's Elysee Palace in Paris. During a speech to the nation on Friday, President Francois Hollande said that in addition to the 84 people killed, 50 remained in critical condition. He urged the stunned country to "set an example of cohesion and unity for the world."

Members of the French community in Sydney, Australia, gather together on Friday to mourn following another attack on their homeland. A vigil was held in the middle of the city to honor those who perished.

EU flags were lowered to half mast in Brussels to honor the victims. Leaders from the 28-member bloc expressed sadness and outrage at the attack. "Physical and psychological wounds will be slow to heal but I call on the French people to stand strong and united against these acts of hatred," said EU Parliament President Martin Schulz.

Italian President of the Chamber of Deputies Laura Boldrini (right) embraces French ambassador to Italy Catherine Colonna. The two women were paying tribute to the victims in front of the French embassy in Rome.

While attending the opening session of the Asia-Europe Meeting (ASEM) summit in Ulaanbaatar, Mongolia, German Chancellor Angela Merkel and other leaders hold a minute of silence for those killed. Merkel said Germany stood by France in the war on terrorism.

Children in India pray for those killed on Bastille Day. At least 10 children were killed in the attack, with more wounded.

Around the world, French embassies have become sites for mourning. Here, Ukrainian President Petro Poroshenko sets flowers down in front of the French embassy in Kyiv on Friday.

A Russian man lays flowers in front of the French embassy in Moscow. In a personal statement to Hollande, Russian President Vladimir Putin called the attack an act of "extreme atrocity and cynicism."