LONDON -- Batman star Christian Bale was to be questioned by police over allegations he assaulted his mother and sister the night before the European premiere of his film, "The Dark Knight," British media reported today.

His mother and sister reportedly complained that the 34-year-old actor assaulted them at a west London hotel on Sunday.

Britain's Press Association said they made the allegation at a police station in south England yesterday and that the allegation was passed on to Scotland Yard in London. It said questioning was expected today.

When asked about the news reports, Scotland Yard said it was investigating an allegation referred to it by another police force but refused to say whether the incident involved Bale.

The Sun newspaper said police did not question Bale yesterday because they did not want to interfere with the premiere.

Bale's U.S.-based representatives did not immediately return messages seeking comment. Phone calls to Bale's London representative rang unanswered.

-- The Associated Press