New Delhi, Jan 20 (ANI): Delhi Police interrogated Congress Leader Shashi Tharoor for almost four hours in connection with Sunanda Pushkar murder case, said Police Commissioner BS Bassi. He said that Tharoor totally cooperated during the interrogation and that further course of action will be taken after detailed report of the questions asked. Tharoor was interrogated at the Vasant Vihar police station in South Delhi last evening. According to reports, Tharoor was asked over 50 questions by a team of four officers in the first of three likely rounds of interrogation.