World leaders have expressed dismay, sadness and solidarity with France over the attack carried out by a man who drove truck into crowds of people celebrating France's national day in Nice, killing at least 84 people.<br/><br/>European Council president Donald Tusk expressed consternation that France was attacked on its national day and said the world stands united with the French people.<br/><br/>US President Barack Obama condemning the incident said it appears to be a horrific terrorist attack and our thoughts and prayers are with the families and other loved-ones of those killed.<br/><br/>Both the US presidential candidates also condemned the attacks. Democrat Hillary Clinton vowed, that civil society will not be intimidated due to this attack and every American stands in strong solidarity with the people of France. Republican Donald Trump declared "this is war".<br/><br/>Russian President Vladimir Putin says he has been shocked by the violence and exceptional cynicism. In a message of condolences to French President Francois Hollande he said that terrorism can be defeated only if all civilized mankind pulls efforts together to fight militants, their leaders as well as targeting their financial backers wherever they are hiding. <br/><br/>Japan has also expressed its anger following the attack. It said that it is shocking.