U.S. Secretary of State Hillary Clinton on Tuesday voiced concern about 'the number of Venezuelan arms purchases,' saying the purchase could lead an arms race in the Latin America. 'We have expressed concern about the number of Venezuelan arms purchases. They outpace all other countries in South America and certainly raise questions as to whether there is going to be an arms race in the region,' Clinton told reporters after meeting Uruguayan President Tabare Vazquez in Washington. Venezuelan President Hugo Chavez said Sunday that his government has received a 2.2 billion U.S. dollars credit from Russia to buy Russian tanks and anti- aircraft missiles. 'The weapons purchase is possible to increase our defense capacity' and the soldiers' morale would also be raised, Chavez told his people in a TV program, but stressed that Venezuela has no plan to invade or attack any nation. During Chavez's visit to Russia last week, the governments of Russia and Venezuela signed agreements on economic and military cooperation. Last year, Venezuela bought more than 3 billion dollars in weapons from Russia. The Obama administration on Monday said Venezuela's arms purchase poses a serious challenge to stability in the Western Hemisphere, urging Venezuela to be 'transparent in its purchases and very clear about the purposes of these purchases.' 