London - The Egyptian millionaire owner of the Harrods department store in London, Mohamed al-Fayed, has been questioned by police over allegations of sexual assault, British media reports said Wednesday.

They said the 75-year-old father of the late Princess Diana's friend, Dodi, had voluntarily subjected himself to questioning over reported claims that a 15-year-old girl was sexually assaulted at business premises in central London last May.

The reports said al-Fayed had not been detained. They quoted police as confirming that a man had been questioned in the case, but the police declined to identify him.

Al-Fayed has long maintained that the death of his son and Princess Diana in a car crash in Paris in 1997 was not an accident but the result of a conspiracy involving British royal family members. (dpa)