At least two persons were killed and four others injured in a collision between an ambulance and trailer here on Monday, police sources said.

According to details, an ambulance carrying a dead body from Karachi to Shorkot collided with a trailer coming from opposite side on National Highway in Zahir Pir area near Rahimyar Khan, killing two persons on the spot and injuring four others, police sources said. Police said that those who died included driver of the ambulance and his companion. The injured and deceased were shifted to hospital. According to eyewitnesses, the accident occurred due to negligence of the ambulance driver.