Simon Danczuk said police had told him they wanted to bring 22 historical charges against the former MP dating back to the period between 1969 and 1988.
He said officers were furious after being blocked from prosecuting the 86-year-old peer by a controversial ruling that he was too ill to stand trial.
Speaking in a debate about the Crown Prosecution Service this afternoon, Mr Danczuk said: ‘I have met with Leicestershire Police and discussed the allegations in detail. Children being violated, raped and tortured – some in the very building in which we now sit.’
The director of public prosecutions, Alison Saunders, announced in April that Lord Janner’s dementia made him unfit to be prosecuted, although that decision is under review.