Four persons, including a woman, were killed on the spot and three others injured when a truck dashed against a tempo on Gaya-Rajgir national highway near Rasulpur village in Bihar's Gaya district today.

Soon after the mishap, angry villagers gathered at the spot and set the truck afire, police said. The driver and his assistant, however, escaped from the scene. The police quoting hospital authorities said the condition of the three injured was critical.