The CPI-M on Thursday urged the government to pursue legally the 2G spectrum allocation case after a court here declared that none of the accused was guilty."The judgement of the CBI special court on the 2G spectrum case raises more questions than answers," the Communist Party of India-Marxist said in a statement. "It was well-established that the allocation of 2G spectrum had caused a big loss calculated to be Rs 1,76,000 crore by the CAG. The Supreme Court had indicted some of the telecom companies involved for misuse of the allocations and cancelled the licences of concerned companies."Since the CBI case and prosecution has proved inadequate, steps must be taken immediately to pursue the matter legally so that those who are guilty are punished," it said.