"Sofia Koller is a Senior Research Analyst at the Counter Extremism Project (CEP) in Berlin, where she currently focuses on the prosecution, rehabilitation, and reintegration of returnees from Syria and Iraq."

"Women’s traditional roles within ISIS have made it hard for some returnees to understand why they were prosecuted, wrote Sofia Koller, a senior research analyst at the Counter Extremism Project, a non-profit organisation based in New York. In the chapter on Germany, Ms Koller quotes one woman as saying: 'I only cooked, had babies, was sitting the whole day in a madafa [a women’s guest house] and then married the next one.'"

"Speaking to The National, Sofia Koller, senior research analyst at the Counter Extremism Project, said: 'The motivation is not clear yet.

'Some media and parts of the public are quick to judge when they see it was a foreign-looking man with a knife, and assume it was a terror attack.'

There are continuing debates and discussions in France and Europe on asylum seekers and immigration, Ms Koller said, speaking from Germany.

'So I think this attack really comes at the worst timing because the debate is quite present at the moment. So this attack might have an even higher impact on French society,' she said."