The US has said it is concerned by an arms build-up in Venezuela, a day after its president announced a major weapons deal with Russia.
US state department spokesman Ian Kelly said Venezuelan policy posed "a serious challenge to stability" in the region.
He also urged Venezuela to be "transparent" about buying weapons.
On Sunday, Venezuelan President Hugo Chavez said that Russia had agreed to lend his country over $2bn (£1.2bn) to buy weapons.
The money would be used to buy arms including 92 T-72 tanks and an S-300 rocket launch system, he said.
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