UML District Office has been torched by an unidentified gang in Saptari on May 22.
The gang had torched UML Saptari District Office by sprinkling mobil at 1 am today, the party source said, adding that the arson damaged a door of the chamber of office secretary.
UML District Office organizing a press conference has condemned the incident today.
The gang and motive behind torching the office have not been established yet, police said.
District chapter of political parties including Nepali Congress have flayed the incident.
Investigation of the incident is underway, police said.