Guns From America Fuel Jamaica's Gang Wars

But they have a long way to go. Jamaican authorities have confiscated only 100 guns coming into ports in the last five years, along with 6,000 rounds of ammunition. That in turn is just a fraction of the 700 or so weapons confiscated on the streets each year.

Authorities know they're only seeing "the tip of the iceberg," said Mark Shields, Jamaica's deputy police commissioner.

With arsenals to rival police firepower, the gangs are blamed for 90 percent of the homicides in Jamaica — 1,611 last year, about 10 times more than the U.S. rate, relative to population.

Unlike in Mexico, the vast majority of Jamaican guns seized are submitted for tracing. Jamaica and the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives find most of the seized weapons come from three Florida counties — Orange, Dade and Broward — all with large Jamaican populations, according to Shields.

X-ray scanners were installed two years ago at Jamaican ports, but the gangs use bribery and intimidation to get their shipments past inspectors.

In April, a newly hired customs supervisor had his tires slashed and days later was shot at on his way home from work, authorities say. The man was known for his strict scrutiny of cargo coming into a gang-infiltrated warehouse on the Kingston wharf.