Many dead as lorry hits crowd in Nice

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A lorry has struck a crowd after Bastille Day celebrations in the southern French city of Nice.
At least 84 people are dead, including many children, the interior ministry says.
A further 18 people are in a critical condition in hospital
The driver of the lorry was shot dead, French media report.
French media reports say he was 31 and known to police.
French President Francois Hollande said the country was "under the threat of Islamic terrorism."
It happened on the famous Promenade des Anglais after a firework display.
The driver was "neutralised", and guns and grenades were found inside the lorry.
One image on Twitter showed about a dozen people lying on the street.
Officials said it was "an attack", asking local residents to stay indoors.
Nice Mayor Christian Estrosi said that "a lorry driver appears to have killed dozens of people".
Prosecutor Jean-Michel Pretre said the lorry drove two kilometres through a large crowd, the AFP news agency reports.