A Swedish festival that describes itself as being "man-free" has been faced with questions over how it will enforce the unusual policy. Statement Festival was created by the comedian Emma Knyckare in response to reports of sexual assaults at other music festivals in the country.

She announced the event in a tweet, writing: "Sweden's first man-free rock festival will see the light next summer."

"In the coming days I'll bring together a solid group of talented organisers and project leaders to form the festival organisers, then you'll hear from everyone again when it's time to move forward," Ms Knyckare said.

She had previously suggested men should be barred from music festivals until they had "learned to behave."

But the festival has come under fire from users of Instagram, the photo-sharing social network, who claimed the policy was discriminatory against transgender people.

This is because the ban on men only applies to what Ms Knyckare described as "cisgender men", a term for a person whose gender identity corresponds to their sex assigned at birth.

One user angrily asked whether the ban extended to transgender men - people who are biologically female but identify as male.

Another wrote: "You have previously argued that transgender men know how it is to be vulnerable and oppressed, just like women, and should therefore be welcomed. What do you do with the rest of the men who are vulnerable and oppressed, then?"