A drone could have captured the moment a woman in her 20s was attacked by four men and raped in a nature reserve.
The victim was walking along a path through woodland at Amberswood Nature Reserve in Hindley, near Wigan, when two men began to follow her, Greater Manchester Police say.
As she turned a corner, two other men were stood in front of her.
She was then raped by more than one of the men.
The attack was reported to Greater Manchester Police at around 2.15pm on Sunday.