New Delhi, Sep 21 (ANI): Reacting to the closure of the disproportionate assets (DA) case against Samajwadi Party chief Mulayam Singh Yadav by the CBI, the BJP on Saturday said that the party is working hand in hand with the Congress. The party futher alleged that the UPA government has played a role in the agency closing the case against the SP chief, which was being probed since 2007.