Headquarters of the Assam Gono Parishad in the city's Ambari area was attacked on Thursday by people protesting against the Citizenship (Amendment) Bill, police said.
The protestors went inside the building, located on the Gopinath Bordoloi Road in the heart of the city, and smashed a few window panes and damaged the property, they said.
Several vehicles, including those of the police, parked outside the building were also vandalised, they added.
Officials said police then had to baton-charge the agitators. Several teargas shells were also lobbed.
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