Hostile states and ideologically motivated groups exploit the information vacuum that follows major incidents to spread damaging disinformation, experts warn.
Falsehoods about identity, ideology and motivation spread in the aftermath of the killing of three girls at a UK dance class, much as they did following the Bondi Junction attack in April.
A teen was arrested shortly after the girls - aged six, seven and nine - were fatally stabbed at Southport in England's northeast on Monday.
