I've seen several comments on various sites complaining that the BBC hasn't reported that the killer in Nice shouted "Allahu akbar!" during the massacre.
The article by Rozina Sini of the BBC's UGC and Social News team, ends by saying:
The Nice attack provides another example that some people take advantage of tragedy to spread false rumours online. It is an increasing problem for those affected by such events and those searching for the truth.