ST. PAUL (AP) — Two Native American tribes in northern Minnesota are asking state regulators to stop the imminent construction of Enbridge Energy’s Line 3 crude oil pipeline replacement, saying it would increase the risk of coronavirus infections spreading.

The Red Lake and White Earth Bands of Chippewa filed a motion late Wednesday asking the Minnesota Public Utilities Commission to stay its approval of the $2.6 billion project. They argue construction would put locals at increased risk of coronavirus infections as workers move into the area.

The pipeline project took a step forward on Monday when the U.S. Army Corps of Engineers approved the final federal permit needed. The Public Utilities Commission has already approved the project several times, but still needs to give construction a final green light.