Congress today questioned the U-turn made by the BJP in the Malegaon blasts case. Addressing media persons in New Delhi, senior Congress leader Anand Sharma alleged that the BJP is continuously trying to shield and protect its affiliates. <br/><br/>He also accused the NDA government of interfering in the work of investigating agencies like NIA.<br/><br/>BJP had yesterday said Congress should not do politics over the NIA's decision of giving clean chit to Sadhvi Pragya Thakur, prime accused in the case.