Tyendinaga Mohawk protesters remain camped at the CN/Via Rail tracks on Wyman Road Saturday morning.
The group is blocking the tracks causing freight and passenger trains to be cancelled between Toronto and Montreal, according to the Via Rail website.
The protesters moved a dump truck and plow near the tracks on Thursday to halt train traffic.
The protests are in support of a First Nation in British Columbia who are trying to block a natural gas pipeline from being built on their territory.
RCMP moved in and arrested several people in BC this week.