New Delhi: Delhi Deputy Chief Minister Manish Sisodia on Sunday alleged that all the central investigating agencies were conspiring against the AAP. "Nowadays CBI, ACB and police all have one work: to conspire against the AAP and arrest its leaders," Sisodia tweeted. "That's why Pakistani agencies have to be called (to India) to probe cases of terror attacks." But he said Prime Minister Narendra Modi was yet to realise the mettle the Aam Aadmi Party leaders were made of. Sisodia's remarks followed the arrest by the Central Bureau of Investigation (CBI) of Rajendra Kumar, principal secretary to Delhi Chief Minister Arvind Kejriwal, in a case of alleged corruption. Under Delhi's unique power structure, Delhi Police and Anti-Corruption Branch (ACB) do not report to Kejriwal but to the central government. The AAP accuses Modi of using them to harass the party and its government.