Negotiations to give the U.S. access to the bases for 10 years are expected to be completed by the end of the month, senior U.S. military official Frank Mora told The Associated Press.
Venezuelan President Hugo Chavez calls the plan a serious threat to the region, and other South American nations from Brazil to Bolivia have also expressed concern.
"It does not envision any larger military presence," said Mora, the deputy assistant secretary of defense for the Western Hemisphere. "It formalizes what we're already doing."
U.S. officials say American troops will continue to be involved in helping Colombia in counter-drug operations and in supporting its fight against leftist rebels.
The U.S. has on average 250 troops in Colombia, a number could increase to 400 because of construction work planned at one of the bases, Mora said in a telephone interview.
Read more here.
Semana International delivers news about Colombia in English. Find more in our home.