Army Corps wants more cooperation from Dakota Access company

The U.S. Army Corps of Engineers says it's trying to diffuse tensions between Dakota Access pipeline protesters and law enforcement in North Dakota, but that the pipeline's developer isn't cooperating.

The Corps asked Texas-based Energy Transfer Partners in a news release Wednesday to stop work in the area where protests against the $3.8 billion pipeline have resulted in more than 400 arrests in recent months.

The Associated Press emailed an ETP spokeswoman asking for comment Thursday morning.

The Corps made a similar plea last week but was rebuffed. ETP this week said crews are mobilizing equipment in preparation for tunneling under Lake Oahe.

The 1,200-mile pipeline from North Dakota to Illinois is complete except for under that Missouri River reservoir, which has been delayed while the Corps reviews its permitting.