"It was a matter of an idol being vandalised by some miscreants, which led to the communities coming face-to-face".
He added that an enraged mob also went on a rampage on National Highway 31, hurling stones at the vehicles and leaving scores of them damaged.
However, the situation had come under control after the security personnel were deployed in the city.
Union Minister of State for Home Hansraj Ahir has blamed Bihar governments for communal violence in the state on Ram Navami while saying that it was their responsibility to maintain law and order.
In the last couple of days reports of communal strife were also reported from Samastipur and Nalanda district of the state.
Communal tension had also erupted in Nawada previous year and in 2013.
Chief minister Nitish Kumar has been facing criticism for his failure in dealing with the situation.
On Thursday, Rashtriya Janata Dal (RJD) leader Tejashwi Yadav on Friday accused Rashtriya Swayamsevak Sangh (RSS) Chief Mohan Bhagwat of giving training on how to incite riots.
However, Union Minister Ram Kirpal Yadav refuted Tejashwi and called his allegations baseless.
In a related development on Friday, a Bharatiya Janata Party (BJP) worker Anil Singh, who was arrested in connection with the recent communal clashes in Aurangabad town, managed to escape from police custody.