The groups clashed over the construction of the road as the land one group claimed to be its. While the other group wants the road to be constructed, they said.
In the clash, members of one group threw acid on others resulting to burn injuries to six, Officer in-charge of Narpatganj police station, Praveen Kumar said.
Two women out of six - Gita Devi and Anandi Rishideo - have been badly burnt in the acid attack, the OC said.
On the basis of a complaint by the victim Anandi, an FIR has been lodged with the Narpatganj, the OC said, adding investigation was on.
Five persons have been arrested so far in this connection, Kumar said.
