The "Divergent" star was among around 100 protesters who turned up to the site to air their views against the proposed pipeline plans, which aims to transport crude oil from the North Dakota Bakken region through South Dakota and Iowa into IL, crossing the Missouri River.
The move is significant because the company building the 1,100-mile (1,886-km) oil pipeline, Dallas-based Energy Transfer Partners LP, has bought tracts of land and relied on eminent domain to clear a route for the line across four states from North Dakota to IL. The Standing Rock Sioux Tribe has said the land contains sacred burial sites.
The water protectors taking a stand against the Dakota Access pipeline (DAPL) invoked 1851 Treaty rights on Sunday October 23 over unceded territory as authorities intensified their militarized crackdown and arrested 127 people. Officers used pepper spray to protect themselves and control protesters who were trespassing on private property, the Morton County Sheriff's Department said, though protesters pointed to video they said showed the use of pepper spray was unwarranted.
The Dakota Access pipeline - a 1,172-mile project - would move more than half a million barrels of crude oil per day through the Dakotas and Iowa, to a hub in IL.
Meanwhile, local law enforcement fired on two unmanned media drones, claiming that "protesters attacked a helicopter with a drone", and that the helicopter pilot and passengers were "in fear of their lives".
Energy Transfer Partners, the company behind the DAPL, recently got a green-light to resume construction after the U.S. Court of Appeals for the District of Columbia Circuit rejected the Standing Rock Sioux Tribe's request to halt the project.
Morton County Sheriff Kyle Kirchmeier called encampment "intentional, planned, coordinated and outright unlawful".
"There are a few hundred protesters who have set up teepees and other things in the area", Preskey said.
Law enforcement immediately condemned the move as illegal.
According to the Morton County Sheriff's Department, protectors have blocked the road at the intersection of Highways 1806 and 134. Protesters said police threw people to the ground as they attempted to leave, CNN reported.
"Today's situation clearly illustrates what we have been saying for weeks: that this protest is not peaceful or lawful", he said.
Soon after the protests began, more than 1,000 supporters began gathering at Sacred Stone Camp, where many clashes with police and construction officials have since taken place.
Saturday's arrests were the latest examples of an escalating pattern of abuse of power on the part of law enforcement, Standing Rock Chairman Paul Archambault said.
Meanwhile, law enforcement shot a drone camera after it flew at a law enforcement helicopter "in a threatening manner", Sheriff Kirchmeier said.