KATHMANDU, Nov. 9 (Xinhua) -- Four people were killed and 30 others wounded after a passenger bus veered off a highway in Surkhet district of mid-western Nepal on Friday afternoon.

"The bus carrying 34 people fell 150 meters down the highway, killing four on the spot," Birendra Bishwokarma, spokesperson for district police, told Xinhua.

He noted that three of the injured were in serious conditions, adding overspeed may be the cause of the fatal accident.

In a separate accident on Friday morning, two passenger buses collided in Nepal's Chitwan district, leaving five dead and five others injured.

Hundreds of people lose their lives in traffic accidents in Nepal each year. ■