Jaipur: Rajasthan CID yesterday quizzed three persons employed at the official residence of former minister Babulal Nagar, who has been alleged of raping a 35-year-old woman.

The state government, meanwhile, sent a letter to the Union Home Ministry recommending a CBI probe into a rape case allegedly involving Nagar.

Three employees at Nagar's official residence were questioned by the CID unit of the state police, a police spokesman said.