The speeding bus, travelling from Guwahati to Jaleswar in Goalpara district, collided with a truck coming from the opposite direction on National Highway 37 at Shakhati near Boko killing four persons on the spot, they said.
A woman, identified as Bulu Rabha, succumbed to her injuries on way to the hospital while the injured, with most in a critical condition, have been rushed to the Guwahati Medical College Hospital.
The bus has been completely damaged, sources added.