TMC national general secretary Abhishek Banerjee on Thursday accused the central agencies of targeting opposition camps to serve interests of the ruling party at the Centre but wondered why summons are not sent to BJP leaders whose names surfaced in ponzi schemes.Banerjee lashed out at the Enforcement Directorate ED after the agency summoned West Bengal Minister Moloy Ghatak in connection with its probe in the coal pilferage case and said the party would emerge stronger the more the Union government harasses it.The central investigating agencies are targeting opposition parties because the BJP has instructed them to harass opposition leaders.