Senior IPS officer SN Srivastava has been appointed as Special Commissioner (Law and Order) of Delhi Police, with immediate effect.His appointment came at a crucial time as communal violence is raging in parts of Delhi for the last two days.Srivastava earlier headed the elite Special Cell of Delhi Police.At least 11 persons, including a Delhi Police head constable, have lost their lives and more than 180 people have been injured in the communal violence that erupted in North-East Delhi on Monday.Earlier in the day, Union Home Minister Amit Shah also held a meeting with Delhi LG Anil Baijal, Chief Minister Arvind Kejriwal, Police Commissioner Amulya Patnaik among others over the violence and prevailing situation in areas of Delhi.