Tension broke out for sometime at Atchyutapuram on Thursday following alleged beating of some displaced persons.
It said the displaced persons who were called for talks over providing jobs were beaten up by the management of Brandix.
CPI (M) district secretary Ch. Narsinga Rao alleged that police caned the protesters after the persons, who sustained injuries, were rushed to the Government Hospital, Anakapalle, in 108 Ambulance.
Mr. Rao said the workers in the area had been protesting against the management over its failure to give minimum wages and provide jobs to the project-affected people.