Mumbai Congress chief Sanjay Nirupam on Friday demanded that a case of forgery be registered against Maharashtra Cooperation Minister Subhash Deshmukh. The Congress has accused the minister of forging documents and fabricating permissions to get a contract for Lokmangal Multistate Co-operative Society’s milk processing plant in Solapur. The Co-operative Society has been founded by Deshmukh, a BJP leader. The state Dairy Development Department said on Thursday that a Rs 24 crore contract granted to the plant has been scrapped.