Police were forced to subdue protestors after they entered the headquarters of American Municipal Power, located on Airport Drive in east Columbus, 10TV News reported.

SLIDESHOW: Chopper 10 Images Of Protest

Dozens of members with the group, Earth First, were at the headquarters protesting plans to build a new power plant in Meigs County.

Video from Chopper 10 showed the activities gathering outside the building.

According to police, five demonstrators entered the building and chained themselves up. Officers used Mace when the demonstrators refused to leave, 10TV News reported.

Eight people were arrested during the demonstration, police said.

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