BJP spokesperson Ravi Shankar Prasad also hit out at Foreign Minister Salman Khurshid for targeting the then Home Secretary RK Singh, now a BJP member, for allegedly harming the case.
Prasad asked whether government policy was determined by a home secretary or by the ruling dispensation at the political level.
Accusing the government of going overboard to secure to the marines one relief after another, he said, "My charge is that this government has meekly caved in to pressure from Italy. Should the nation presume that India today is finding it difficult to resist pressure from Italy?
Meanwhile, dismissing the charge that he was responsible for having handled the case poorly as the home secretary, Singh said crucial decisions were taken at a meeting attended by the attorney general and senior External Affairs and Home Ministry officials.
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"No question," Singh shot back when asked if he was responsible for decisions which might have weakened the case.
He instead accused the government of "short-circuiting" the judicial process and suggested that it might have to do with the fact that the marines were from Italy.
The allegations by BJP drew a sharp retort from Congress, which asked whether the opposition believed that Supreme Court had given in to pressure from Italy.