BUFFALO, NY - Local supporters are rallying in an effort to get the government to reject proposed plans to put a pipeline under Lake Oahe.

Dozens gathered Tuesday outside the Army Corps of Engineers in Buffalo as part of a day of action in solidarity of those at Standing rock.

More than 200 tribes, including the Seneca Nation, have joined with the Standing Rock Sioux tribe in a remote region of North Dakota to object to the construction of Energy Transfer Partners' $3.7 billion pipeline, which would span four states in the Great Plains and Midwest, crossing through sacred ancestral Native American lands.

The Army Corps of Engineers released a statement on Monday for more discussions with Standing Rock Sioux before it decides whether to allow the pipeline to cross under Lake Oahe.

The tribe says the pipeline threatens drinking water and cultural sites.

(The Associated Press contributed to this report.)