PARIS: French police on Wednesday detained prominent Swiss Islamic scholar Tariq Ramadan, a legal source said, months after two women filed rape charges against him.

The Oxford professor was summoned for questioning to a Paris police station and taken into custody "as part of a preliminary inquiry in Paris into rape and assault allegations", the source said.

Ramadan, the grandson of the founder of Egypt's Muslim Brotherhood Islamist movement, has furiously denied rape allegations from two women that emerged late last year, as the Harvey Weinstein scandal unfurled in the US.

Henda Ayari, a feminist activist, says Ramadan raped her in a Paris hotel room in 2012, while an unnamed disabled woman also accused the academic of raping her in a hotel room in Lyon in 2009.

In November, Oxford University announced that 55-year-old Ramadan was taking a leave of absence from his post as professor of contemporary Islamic studies, "by mutual agreement".

Ayari detailed her rape allegations in a book published last year, without naming Ramadan. But in October she said she had decided to name him publicly, encouraged by the thousands of women speaking out against sexual assault and harassment under the "Me Too" online campaign and its French equivalent, "Balance Ton Porc" (Squeal on your pig).