New Delhi, Sep 18 (ANI): BJP leader Vinay Katiyar on Wednesday demanded a SIT investigation into the Muzaffarnagar violence case, a day after a news channel telecast a sting operation showing Budhana inspector Rishipal and the Inspector of Fhuwana police admitting that they delayed taking action to contain the violence under "political pressure". Katiyar also charged SP leader Azam Khan for being behind the riots.