BJP leader Varun Gandhi on Wednesday approached the Supreme Court challenging invoking of National Security Act (NSA) against him by Uttar Pradesh government for allegedly inciting communal tension. Senior advocate Mukul Rohatgi and Sandeep Kapoor appeared on behalf of Varun before a Bench headed by Chief Justice K G Balakrishnan and sought permission to file the petition. The Bench allowed their plea that the petition be included in the mentioning list for Thursday. The Uttar Pradesh government had booked Varun under the National Security Act on Sunday for the hate speeches. The BJP candidate has been shifted to a high-security Etah jail following intelligence inputs that underworld don Chota Shakeel was hatching a conspiracy to kill him. Varun was shifted on Tuesday night under heavy security from the district prison here,official sources said. Intelligence agencies had informed the Uttar Pradesh Government a week ago about an intercepted telephonic conversation between Shakeel and one of his key shooters indicating a plot to kill 29-year-old Gandhi,the day he came to surrender at a Pilibhi Court,the sources said.