Melbourne, July 2 (IANS) Actor Mel Gibson has been accused of making racist remarks to ex-girlfriend Oksana Grigorieva.

Two separate US celebrity websites claim to have knowledge of the tirade available on secret audio tapes that Grigorieva is said to have made when her three-year relationship with the superstar fell apart.

In the tape, the 54-year-old actor attacked Grigorieva’s choice of clothes, saying: ‘You’re an embarrassment to me. You look like a … pig in heat and if you get raped by a pack of niggers it will be your fault.’

He has also called her a string of insulting names on the tapes, which have been submitted to a court and sealed from the public, reports heraldsun.com.au.

She and Gibson are fighting over the custody of their eight-month-old daughter Lucia, who was born just seven months after Gibson and his Australian wife of 28 years Robyn Moore filed for divorce.

It is being said that the tapes are expected to form part of the his and Grigorieva’s secret custody battle.

Gibson’s representative refused to comment on the tapes, except to say he could not verify their authenticity.

This is not the first time Gibson has been accused of a racist remark. In 2006, he was accused of racist rant against Jews. When Malibu police arrested him for drink driving, Gibson said: ‘The Jews are responsible for all the wars in the world.’