"Upon request of France, EU ministers to add fight against terrorism on their agenda on Monday," the European Council of leaders from the 28 EU countries said on Friday.

France's embassy to the EU confirmed on Twitter that it had made the request.

The EU is increasingly worried about the threat posed by the Islamic State group in Syria and Iraq.

The attack by a Tunisian-born man in Nice in which 84 people were killed is the latest in a series of terror strikes in Europe in recent years, especially in France and Belgium.

The EU foreign ministers will meet US Secretary of State John Kerry for breakfast on Monday before holding talks among themselves on issues including Syria and Libya.

The talks will also be the first in Brussels for new British Foreign Secretary Boris Johnson, who supported Britain leaving the EU in a referendum last month.