A Colombian court has declared as unconstitutional a deal which gives US troops access to its military bases.
The constitutional court ruled the 2009 accord should be redrafted as
an international treaty and sent to Colombia's Congress for approval.
The deal allows the US to use seven bases to help with operations against drug trafficking and terrorism.
But it was criticised by other Latin American countries over a concern about the rise in US influence in the region.
The US, which has supplied Colombia with more
than $7bn (£4.5bn) in aid since 2000, was forced to look for a new
centre for regional operations after Ecuador refused to renew the lease
on its military base at Manta.
The deal agreed by former President Alvaro Uribe in October
2009 gave the US access to the bases for 10 years and would see a
maximum of 800 US military personnel and 600 civilian defence
contractors based in Colombia.
They would operate the US aircraft that maintain 24-hour
monitoring of the region, intercepting communications and coordinating
with spy satellites to protect US interests.
But the court's chief justice Mauricio Gonzalez said the deal
was "an arrangement which requires the State to take on new obligations
as well as an extension of previous ones".
He said that as such, it should be "handled as an international treaty, that is, subject to congressional approval".
The court did not rule on the legitimacy of the agreement
itself and the ruling does not mean the US has to leave the country
altogether.
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Juan Manuel Santos, Colombia's new president |
The BBC's Jeremy McDermott in Bogota says the government of
the new President Juan Manuel Santos has a large majority in Congress
and he will be confident of getting a redrafted version of the agreement
approved.
The ruling will, however, please many of Colombia's
neighbours, says our correspondent, particularly President Hugo Chavez
of Venezuela, who had repeatedly accused the US of planning to use the
bases to invade his country and seize its oil reserves.
BBC News