The Jay Krishna Goit-led faction of Janatantrik Tarai Mukti Morcha (JTMM) detonated bombs in four different areas of the Janakpur municipality on Saturday night.
According to reports, the bombs were detonated at Mills Area Chowk, Bhanu Chowk, Ramananda Chowk and Kapileshwor area of the municipality.
The bombs went off at around 8:30pm. No human casualty has been reported in the blasts as the bombs went off at open areas, police said.
The JTMM-Goit Dhanusha district in-charge Dipak owned up the explosions.
Police said search for the persons involved in the explosions is on and security in Janakpur municipality has been tightened.
The JTMM has been involved in violent protests in terai region demanding seperate terai state.