New Delhi: The CBI on Monday arrested Rajendra Kumar, principal secretary to Delhi Chief Minister Arvind Kejriwal, and four others, including former assistant director of VAT department Tarun Sharma, in a corruption case. Apart from Rajendra Kumar and Sharma, the Central Bureau of Investigation (CBI) arrested two directors of Endeavour Systems Private Limited Sandeep Kumar and Dinesh Kumar Gupta, and another person Ashok Kumar, an official said. The CBI had on December 14, 2015 registered a First Information Report (FIR) against Rajendra Kumar for allegedly abusing his official position in awarding contracts from the city government to private firm Endeavour Systems Private Limited. Six others were also named in the FIR by the CBI on a reference by the Anti Corruption Branch (ACB) of the Delhi government. The others booked in the case include two former managing directors of Intelligent Communication System India Limited (ICSIL) A.K. Duggal and G.K. Nanda, the present managing director of ICSIL R.S. Kaushik and the two arrested directors of Endeavour Systems Private Limited. According to the FIR, Rajendra Kumar promoted a company, Endeavour System Pvt. Ltd. from 2007, by allegedly misusing his official position and facilitated tenders worth Rs 9.5 crore to it. The CBI claimed that it had also confirmed the allegations through its own sources before filing a case on charges of criminal conspiracy and under the Prevention of Corruption Act. The CBI said the documents seized from the office of Rajendra Kumar reflected "criminal conspiracy and criminal misconduct" and abuse of official position by the accused persons. The CBI had conducted raid on Rajendra Kumar's office on December 15, 2015 at the Delhi Secretariat. The arrest had provoked Kejriwal to attack Prime Minister Narendra Modi in a series of tweets where he called the Prime Minister a psychopath and alleged that the real target of the CBI raid was he himself. "When Modi cudn't handle me politically, he resorts to this cowardice. Modi is a coward and psychopath," Kejriwal had tweeted.