The World Court has rejected a request by Uruguay to force Argentina to end blockades of key roads and bridges between the two countries.
Argentina had erected the blockades to protest Uruguay's plan to build two pulp mills on the Uruguay River, which forms the countries' border.
By a 14-1 vote, the court said it did not believe the blockades risked harming the rights claimed by Uruguay. The World Court is still considering the legality of the pulp mills, but Uruguay had asked for an interim ruling to lift the blockades.
The World Court, formally known as the International Court of Justice, is the highest court of the United Nations. Set up in 1946 to resolve disputes between states, the court's rulings are final and not subject to appeal.
Some information for this report was provided by AP and Reuters.