President Barack Obama on Friday decried the deadly truck attack in Nice as a "tragic and appalling" on freedom and pledged firm U.S. support for France.

"We cannot give in to fear or turn on each other or sacrifice our way of life," Obama told a gathering of diplomats at the White House attended by French Ambassador Gerard Araud.

European Union foreign ministers will discuss the fight against terrorism at talks in Brussels on Monday after the deadly Bastille Day lorry attack in Nice, the EU said.

U.N. Security Council envoys observed a moment of silence on Friday for the victims of the Bastille Day attack in Nice that left at least 84 dead, including many children.

The council chamber fell silent as ambassadors rose to their feet and bowed their heads at the start of a meeting called to discuss the situation in Iraq.

U.S. Secretary of State John Kerry and his Russian counterpart Sergei Lavrov on Friday offered their condolences at the French embassy in Moscow over the Nice truck attack that left at least 84 people dead.

New British Foreign Secretary Boris Johnson will meet Sunday with EU foreign affairs chief Federica Mogherini, but she has scrapped a dinner for him and his 27 counterparts to discuss Brexit, officials said.

The family of one of the most notorious Islamic State jihadist group commanders, Omar al-Shishani, on Friday received condolences from locals in his home village in ex-Soviet Georgia, apparently confirming reports of his death.

Georgia executed a prisoner by lethal injection early Friday, the first U.S. execution in more than two months, ending a pause that reflects a decline in capital punishment.

John Conner, 60, died at 00:29 (0429 GMT) in Jackson -- 50 miles (80 kilometers) southeast of Atlanta -- the state's prison authorities said. He had been imprisoned for 34 years.

Republican White House candidate Donald Trump on Friday announced Mike Pence, the governor of Indiana, as his choice for vice president, ending weeks of intense speculation and putting a conservative stalwart on the ticket.

"I am pleased to announce that I have chosen Governor Mike Pence as my Vice Presidential running mate," Trump posted on Twitter.

Ethiopia said Friday it was ready to send more soldiers to strengthen the U.N. peacekeeping mission in South Sudan.

British Prime Minister Theresa May called an emergency national security meeting Friday after the Bastille Day attack in the French city of Nice, in which at least 84 people were killed.