Dozens formed a ` ` human barrier '' to keep heavy machinery from working at pipeline site . Three protesters suspended themselves from two pine poles to stop pipeline work . Deputies used pepper spray to remove protesters , group says . A 75-year-old woman was among those pepper sprayed and arrested , he said . Company building the pipeline did not immediately respond to the protests .
Dozens formed a ` ` human barrier '' to keep heavy machinery from working at pipeline site . Three protesters suspended themselves from two pine poles to stop pipeline work . Deputies used pepper spray to remove protesters , group says . Company building the pipeline did not immediately respond to the protests .