What we know:
- Truck ploughed into crowd in French city of Nice
- At least 84 dead and many injured
- Truck driver shot dead
- President Francois Hollande declares three days of mourning
- Reports of arms, explosives found inside the truck
If you have any concern about family and friends, the Department of Foreign Affairs and Trade 24 hour Consular Emergency Centre can be reached on 1300 555 135 or +61 2 6261 3305 if calling from overseas.