Bahrain's ambassador to France on Wednesday denied "unfounded allegations" he had groped a former domestic worker in his exclusive Paris residence.

Naser Al Belooshi's statement came the day after French authorities launched an initial investigation into complaints made by a 44-year-old female former worker.

A judicial source has said the alleged sexual harassment occurred from July 2010 to October 2011, with the woman saying she was fired soon after, along with her husband.

The alleged victim also said the ambassador's son had threatened her with a gun in September 2010.

A police source told AFP news agency on Monday the husband had also filed a complaint.

"His Excellency Naser Al Belooshi, Ambassador of the Kingdom of Bahrain to France, forcefully refutes the inaccurate and unfounded allegations of assault that former domestic workers have made against him and his son," the embassy said in a statement.