Sputnik news agency quoted the authorities, as saying that the bus drove into the train's path of the train at a railway crossing.
Kazakhistan Foreign Ministry spokesman Anuar Zhainakov said that two Kazakh nationals were the drivers of the bus. One of them died.
According to reports, the bus had a Kazakh license plate and passengers were from Uzbekistan.
Regional authorities identified 15 Uzbek nationals as victims. (ANI)