Colombian opposition groups have reacted angrily after details of a controversial military deal with the US were made public. Under the 10-year deal, the US military will not only have access to military bases, but also be able to use major international civilian airports. US personnel and defence contractors will also enjoy diplomatic immunity. President Alvaro Uribe says the agreement will help rid Colombia of drugs gangs and left-wing rebel groups. The accord was signed on last Friday but full details were only made public on Tuesday. Venezuela has broken off diplomatic relations with Bogota and Venezuelan President Hugo Chavez has warned that Colombian military bases could be used by the US to attack his country. Other countries in the region, including Brazil and Chile, have also expressed concern.