ULAN BATOR, Oct. 19 (Xinhua) -- At least seven people were killed and more than 30 others injured in a bus accident in Mongolia on Saturday, according to the country's Traffic Police Department.

The accident occurred around 12:00 a.m. local time Saturday (1600 GMT Friday) near the capital city of Ulan Bator.

The victims were employees of the Mongolian University of Internal Affairs, said the source.

The injured people were sent for treatment in Ulan Bator.

An investigation is ongoing to uncover the cause of the accident.