Citing investigative journalists' reports, BJP leader Smriti Irani on Thursday alleged Congress leader Kapil Sibal and his wife acquired ₹89-crore worth prime property in Delhi after buying the property owner, Grande Castello, for ₹1 lakh. Grande Castello is a subsidiary of a firm owned by Piyoosh Goyal, who was investigated by the CBI for bribery during the UPA regime.