Bihar Chief Minister Nitish Kumar today requested his Haryana counterpart Manohar Lal to take stern action against those involved in the killing of a 7-year-old boy at the Ryan International School in Gurugram. He called up Mr Manohar Lal and also expressed his grief over the incident. <br/><br/>An official release said that Bihar Director General of Police P K Thakur had a telephonic conversation with his Haryana counterpart and requested him to to take strongest possible action against the culprits in the case.