France has declared three days of national mourning after the terror attack in Nice in which at least 84 people were killed.
French Prime Minister Manuel Valls said after an emergency government meeting that the national mourning would begin on Saturday.
And he confirmed that a measure extending the country's state of emergency would go before politicians next week.
The atrocity in Nice happened when a large truck mowed through crowds gathered for Bastille Day fireworks in the Riviera resort, killing at least 84 and sending dozens fleeing into the sea as it bore down for more than a mile along the city's waterfront Promenade des Anglais.
Flags were lowered to half-mast in Nice and in Paris, and President Francois Hollande extended the state of emergency imposed after the November bloodshed by another three months.
Around the UK French flags have also been flying at half-mast. The tricolour flag can be seen outside Downing Street.
The French flag was lowered at The Open Championship in South Ayrshire.
And in George Square, Glasgow.
As well as elsewhere in the UK...
"All of France is under the threat of Islamic terrorists," a sombre President Hollande said on national television early on Friday.
He added: "France was struck on the day of its national holiday, July 14, the symbol of liberty,"