A rail company with a trainload of contaminated soil resumed its search for a place to unload after police removed three Greenpeace protesters who had chained themselves to it.

Greenpeace wants the dirt returned to Michigan. The train has traveled through Michigan, Ohio, West Virginia, Kentucky and Tennessee in search of a place to dispose of its load.Before that it had been parked on a siding in a CSX Transportation rail-yard near Sumter since April 11.

"It needs to go back to Michigan - no other state," said John Mitchell, Greenpeace's national toxics coordinator. "They'll either have to burn it or landfill it."