(210719) -- DERA GHAZI KHAN, July 19, 2021 (Xinhua) -- Photo taken with a mobile phone shows the road accident site in Dera Ghazi Khan district of Pakistan's Punjab province on July 19, 2021. At least 27 people were killed and over 30 others injured when a passenger bus collided with a trailer in Pakistan's eastern Punjab province, local media reported Monday morning. (Str/Xinhua)