BISMARCK, N.D. — The federal government on Friday temporarily blocked construction on part of a North Dakota oil pipeline, an unusual intervention in a prairie battle that has drawn thousands of Native Americans and activists to camp and demonstrate.

In announcing the pause, the government acknowledged complaints from the Standing Rock Sioux and other tribal nations that their concerns had not been fully heard before federal overseers approved a pipeline that the tribe said could damage their water supplies and ancestral cultural sites. The Justice Department and other agencies called for “serious discussion on whether there should be nationwide reform with respect to considering tribes’ views on these types of infrastructure projects.”

The tribe in a statement called the federal order “a game changer.”

The government’s move, announced minutes after a federal judge rejected efforts by the Standing Rock Sioux to block construction of the project, appeared to seek to ease tensions and reset the terms of a passionate debate that has cast the 1,170-mile Dakota Access pipeline either as an economic boon for the Plains or a threat to Native American sovereignty, waters and lands. But perhaps more significantly, it appeared to signal a broader willingness to re-examine the involvement of the tribes in infrastructure decisions like this one.

The government said it would invite tribes to attend formal consultations about how they might work together on federal decisions on tribal lands and on whether future legislation is needed.