LUCKNOW, Aug. 28 -- At least three people were killed and 20 others injured, five of them critically, when a speeding truck rammed into a private passenger bus parked by the roadside on the Purvanchal Expressway in Sultanpur early Thursday, police said. The accident occurred around 5:30 am in Baldirai police station area, around 35 km from the Sultanpur headquarters. The passengers were travelling from Gurugram to Bihar, with many heading home for Raksha Bandhan. Sultanpur's Baldirai circle officer Ashutosh Kumar said the deceased were identified as Shyamlal Mandal, 42, Vinod Mandal, 50, of Gurugram, and Kiran Devi, 60, of Bihar. Police and Uttar Pradesh Expressways Industrial Development Authority (UPEIDA) personnel reached the spot and shifted the injured to nearby hospitals. According to police, the bus had left Gurugram around 4 pm on Wednesday for Bihar via Gorakhpur. Passengers told investigators that the driver had repeatedly stopped on the expressway despite requests not to do so. The bus was eventually parked roadside and the driver reportedly got down to use the toilet. The truck then crashed into the stationary bus from behind, extensively mangling its rear portion and crushing the last two rows of seats. The truck driver fled with the vehicle after the crash. Police are examining CCTV footage to identify the truck and trace its driver....