President Hollande has arrived in Nice following the latest terror attack on France, on its national holiday.

World leaders have sent messages of solidarity, and support.

Juliette Gash reports;

French Ambassador to Ireland Jean-Pierre Thébault spoke of the horror of hearing the news on a night that means so much to French values.

Statement by President Michael D. Higgins on the #BastilleDay #NiceAttack https://t.co/TjI1gIuNQg

— President of Ireland (@PresidentIRL) July 15, 2016

An online book of condolences has been opened by the French Embassy in Dublin;

Should you wish to express condolences after the attack in Nice, an online book is open https://t.co/eETqCxR2iq pic.twitter.com/Vch16olGSH

— France in Ireland (@FranceinIreland) July 15, 2016