The human rights group Amnesty International harshly criticized Colombia in a 94-page report issued Tuesday and urged the US to halt military aid to Colombia unless and until it manages to rein in the killings of civilians and other human rights abuses.

The US government has provided more than $5 billion in assistance to Colombia, the vast majority of it military, since the Clinton administration initiated Plan Colombia in 1999. Originally sold as a purely counter-narcotics package, the US assistance has since 2002 morphed into a counter-narcotics and counter-terrorism mission aimed primarily at the guerrilla army of the FARC (Revolutionary Armed Forces of Colombia). The FARC supports itself in part through participation in Colombia's coca and cocaine industry.

Washington has lauded Colombian President Álvaro Uribe for taking the fight to the FARC, and Colombia has seen a decrease in kidnappings and an increased sense of security in some big cities. But in the report, Amnesty questioned Uribe's claims that Colombia "is experiencing an irreversible renaissance of relative peace" and "rapidly falling levels of violence."

"Colombia remains a country where millions of civilians, especially outside the big cities and in the countryside, continue to bear the brunt of this violent and protracted conflict," the report says, adding that "impunity remains the norm in most cases of human rights abuses."

According to the report, more than 70,000 people, the vast majority civilians, have been killed in the past two decades of the 40-year-old war between the FARC and the Colombian state, with somewhere between 15,000 and 30,000 "disappeared" and another 20,000 kidnapped or taken hostage. Colombia is also the scene of one of the world's worst refugee crises, with between three and four million people forcibly displaced.

And despite Uribe's protestations, for many Colombians, things aren't getting any better. According to the report, 1,400 civilians were killed in 2007, up from 1,300 the previous year. Of the 890 cases where the killers were known, the Colombian military and its ally-turned-sometimes-foe the rightwing paramilitaries were responsible for two-thirds. Similarly, the number of "disappeared" people was at 190 last year, up from 180 the year before.

Colombia's internal refugees didn't fare any better, either. More than 300,000 were displaced last year, up substantially from the 220,000 in 2006. Much of the displacement and many of the killings took place as paramilitaries attempted to wrest control of coca fields from the FARC and its peasant supporters.

In addition to pressure from donor countries, one key to improving the human rights picture is to get the Uribe administration to admit that it is in a civil war. Uribe refuses to do so, instead labeling the FARC belligerents as "terrorists."

"It's impossible to solve a problem without admitting there is one," said Marcelo Pollack, Colombia researcher at Amnesty International. "Denial only condemns more people to abuse and death."

The report also found that despite Uribe's claim that demobilization of the paramilitaries has succeeded, the paramilitaries remain active and continue to commit human rights abuses. Disturbingly, the report concluded that the FARC in the last year has been creating "strategic alliances" with the paramilitaries in various regions in the country as both groups seek "to better manage" the primary source of income, the cocaine trade.