A man in his twenties was sitting alone when he was approached by the pair.

One of the men are said to have grabbed him and forced him to the floor, before the second man carried out a serious sexual assault on him.

Senior Investigating Officer, Detective Inspector Jason Simpson, of Force CID based at Milton Keynes said: ‘We are carrying out a thorough investigation into this very concerning incident.

The victim was sitting alone on a park bench when he was attacked (Picture: Shutterstock)

‘As a result of this incident members of the public will see an increased police presence in the area, including neighbourhood patrols.’

He added: ‘We would ask anyone with concerns to speak to one of our officers.

Matt Hancock said he would snitch on his own neighbour for not self-isolating

‘We would ask anyone with information that could assist us to please call Thames Valley Police on 101 quoting reference 98 16/2/18.’

The first offender is described as a black man, around 5ft 10 ins tall and of stocky build. He was wearing a hooded top with the hood up.

The second offender who carried out the assault is described as a black man, about 6ft 1ins to 6ft 2ins tall and of medium build.

He was wearing a grey hooded top, a white buttoned shirt and black suit trousers.

MORE: Girl, 3, froze to death after ‘teachers forgot to bring her in after playtime’

MORE: Angela Merkel says Germany ‘deplores’ Brexit