Police said the accident happened at 5am on the north-bound Nakhon Sawan-Phitsanulok Road in Ban Nong Khem village in Tambon Bueng Nam Rang, in Phichit&rsquo;s Bueng Nam Rang district. 
Police said the worker, Tinnakorn Sungyang, was crushed to death. 
The left front of the bus crashed into a big tree and flipped over. Police said five of the passengers were severely injured and rushed to nearby hospitals. Those with minor injuries would be transported in another bus to their destination in Nan. 
Police said the bus driver, Kampolsak Sriphuchong, apparently dozed off, leading to the accident.

One killed, 50 injured as bus crashes into tree

A bus taking 50 passengers from Bangkok to Nan province crashed into a roadside tree in Phichit province early on Saturday, killing a bus worker and injuring the passengers and the driver.