Seven persons were killed and 10 others were injured today after a speeding Blue Line bus ploughed into a crowd waiting for a bus in the Badarpur area of South Delhi this morning. One person succumbed to his injuries on his way to AIIMS, whereas five women and one child died on the spot. Nine persons sustained injuries in the accident and have been admitted to AIIMS and Apollo Hospital. The Blue Line bus was plying on route No. 460 between Badarpur and Minto Road. According to the driver of the bus, the accident happened due to brake failure. However, witnesses had turned down this excuse. "We cannot say anything yet, the bus was declared fit in the certificate," said police PRO Rajan Bhagat. "It can only be verified after a mechanical inspection