Lucknow, April 22 (Inditop) Senior Congress leader and former Madhya Pradesh chief minister Digvijay Singh has been booked for violating the model code of conduct after he allegedly threatened to “use” the Central Bureau of Investigation (CBI) against Uttar Pradesh Chief Minister Mayawati, police said Wednesday.

“The case against Digvijay Singh was registered Tuesday night on the directions of the district administration,” Hardoi Deputy Superintendent of Police B.B. Chaurasia told IANS on phone.

At a campaign rally Monday in Mallwan locality in Hardoi, about 110 km from here, Digvijay Singh reportedly said the central government would “use” the CBI against Mayawati if she continued to harass Congress workers.