"Ransacking the AASU Office in Silapathar is an act of cowardice. I condemn the act," the governor said in a statement here.
The perpetrators of the incident will be dealt with sternly according to the law of the land and nobody would be allowed to go scot-free, he added.
The governor appealed to the people not to take law into their hands and display absolute restraint. He also urged upon all to maintain peace and harmony to strengthen Assam's pride of being a multi-ethnic, multi-cultural, multi-lingual and multi-religious society.
After the meeting the NiBBUSS members took out a procession and then attacked an AASU office by the side of National Highway 15(B), vandalised it and injured three of its members.
Chief Minister Sarbananda Sonowal has ordered an inquiry by Additional Chief Seretary V B Pyarelal. The report would be submitted in a month.