Two sisters have been arrested after they were filmed harassing and attacking a Hispanic family they called 'fat Mexicans' in a Colorado neighborhood.

Natasha and Shala Fross, both 26, are now facing assault and bias-motivated crime charges.

Juan Carlos Ruiz said the twins appeared out of nowhere while his mother was talking to another Hispanic neighbor near their Commerce City home.

'My mom was at the neighbor's house asking how much it would be to have some carpet installed when these two girls started screaming racist things,' he wrote in a Facebook post about the incident.

Natasha and Shala Fross, 26, are facing assault and bias-motivated crime charges after they were caught on camera attacking and harassing a Hispanic family (pictured)

'[They were saying] "How do Mexicans have money to own the houses we do and have the cars we do" saying stuff like "leave our country"'.

Ruiz said that when his mother started walking back to their house, the Fross twins ran up to her and 'started punching her and pulling on her hair'.

'These girls were just going crazy for no reason,' Ruiz, who filmed the incident, told KDVR.

'I had never seen them before, I didn't even know they lived here. So it was weird.'

Ruiz said his sister Rocio then came out of the house and tried to help get the Fross twins off their mother.

Juan Carlos Ruiz said the sisters appeared out of nowhere while his mother was talking to another Hispanic neighbor near their Commerce City home and launched their attack

Ruiz said that when his mother started walking back to their house, the Fross twins ran up to her and 'started punching her and pulling on her hair' before hitting her sister

'Then I see the girls hitting my sister,' he said. 'They stopped grabbing my mom and went for my sister and that's when I tried to get in between them.'

But Rocio told him and his brother-in-law not to touch the twins because 'we could get in trouble, so we stayed back and recorded and took pictures for evidence.'

'When you see your mother getting beat up by two young girls and you can't do anything about it, it makes you feel powerless,' he later wrote on Facebook.

'To see them pulling on her hair while they scream racist comments! Makes your blood boil!'

The girls can be heard screaming at the family throughout the video as one calls Ruiz's mother an 'old a** fat b***h'.

The girls can be heard screaming at the family throughout the video as one calls Ruiz's mother an 'old a** fat b***h'

'Look at yourself compared to me, who are you to us?' one of them yelled at the family during the incident

'Look at yourself compared to me, who are you to us?' one of them yelled at the family.

Ruiz said the twins were trying to make 'it seem like we were less in a way'.

'When I actually see violence involved with it, physical violence, that's when I was like, okay this is sad. This is wrong,' he told the station.

Ruiz also filmed the police arriving at the scene as the sisters continued to yell and scream that they lived 'right across the street'.

The sisters continued to scream at the family and mentioned multiple times that they lived 'right across the street'

At one point one of the sister's had to hold her twin back as she continued to yell at the family

'This is not looking good for you, wait at your house,' one of the officers tells them. 'Talk crap to them one more time and you're going to jail.'

'Old fat Mexican b****s,' one of the sisters then screams before they get taken into custody.

The case is now being handled by the Adam County District Attorney's Office.

Ruiz said he shared the video online because people think 'racism is a joke'.

'We aren't here to harm anyone,' he wrote on the post. 'Just live a life like everyone else.'

'This is the type of stuff we have to deal with for wanting a better life.'