WARNING: The video above contains very strong language which some people might find offensive.

A shocking video has emerged showing a young boy swearing and using racist language as he sings a Millwall song.

The 30-second-clip shows a woman encouraging young children to swear as they sit in a car chanting.

One of the children, dressed as a police officer, follows the woman’s lead and chants: “Millwall, f*** them all. Millwall, f*** them all.”

Two other children can also be seen in the back of the car as the woman and boy shout obscenities.

But the chanting takes a darker turn when the child turns to the person holding the camera and shouts: “You f***ing black c***.”

Millwall fans and others on Twitter were quick to condemn the racism and woman for encouraging the children to swear.

Twitter user @ThisIsMillwall said: “I been going since 1993 and never heard a racist chant or remark. Home or away. I’m sure there were chants in the 80s, but that was no dif from others.”

It is not clear where, or when the footage was taken