A jeep as well as five persons, including a woman, standing near the Naiwali Chowk, were hit by the buses, they said.
The injured persons were admitted to the local trauma centre where the doctors referred one seriously injured person to PGIMS, Rohtak.
After being hit by the truck, a bus suddenly ran into a sweet shop situated near the Chowk, and damaged goods in the shop while the other bus dashed into an adjoining shop.