Sambhal, Oct. 28 -- More than 20 passengers sustained injuries after an overcrowded double-decker sleeper bus heading from Punjab and Haryana to Bihar overturned in the early hours on the Ganga Expressway in Uttar Pradesh's Sambhal district, an official said here on Wednesday.

The bus, carrying nearly 150 to 200 passengers-far exceeding its legal capacity-was transporting migrant workers and their families heading home to districts including Purnia, Darbhanga, Supaul, and Sitamarhi for the upcoming Diwali and Chhath Puja festivals.

According to surviving passengers, the accident took place between 4:30 AM and 5:30 AM. Eyewitnesses alleged that the bus was travelling at high speed when the driver, who appeared to have fallen asleep or wa...