Delhi Transport Corporation has got the approval to purchase 300 diesel buses to strengthen its existing fleet of inter-State bus service.DTC Chairman A J S Sahni, along with other senior officials, made a presentation before the city Government's Finance Minister Mahinder Singh Saathi and Planning Department officials regarding the approval of the additional fleet. The DTC chairman requested the Finance Minister to release another sum of Rs 70 crore for the purchase of CNG buses for the city bus fleet. "Delhi Government had already released Rs 100 crore for the purchase of CNG chassis and the remaining Rs 70 crore is expected to be released soon," said Mr Sahni.