Colombia has withdrawn from a treaty that binds it to the UN International Court of Justice in anger at a ruling that shifts some of its resource-rich waters to Nicaragua, President Juan Manuel Santos announced on Wednesday.
The Hague-based court last week reduced an expanse of sea belonging to Colombia, drawing a demarcation line in favour of Nicaragua even while saying a cluster of disputed islands in the western Caribbean belonged to Colombia and not to Managua.
The decision set off a scramble in Bogotá to see how to overturn the verdict and avoid diplomatic conflict with Nicaragua's President Daniel Ortega, who sent ships to the area.
Santos has ordered the Colombian navy to remain in the waters granted to Managua.
The highest national interests demand that territorial and maritime limits are set by agreements as has always been the case in Colombian judicial tradition, and not via rulings uttered by the International Court of Justice, Santos said.
This is the moment for national unity. This is the moment that the country has to unite.
The 1948 treaty, known as the Bogotá Pact, recognizes ICJ rulings to find peaceful solutions to signatories' conflicts.
Leaving the pact would mean Colombia is not obliged to heed the court's ruling on any potential bids by Nicaragua to seek additional territory, the government has said. But its withdrawal would not have a retroactive effect, and it would be obliged to comply with last week's ruling.
Ortega has said he expects Colombia to recognize the court decision, which is binding, but experts have said Colombia may reject it and seek to negotiate a new border pact.
Colombia's withdrawal doesn't influence under any circumstance the court's ruling, Carlos Arguello, Managua's representative at The Hague, told reporters.