AMMAN, Jordan — Weapons shipped into Jordan by the Central Intelligence Agency and Saudi Arabia intended for Syrian rebels have been systematically stolen by Jordanian intelligence operatives and sold to arms merchants on the black market, according to American and Jordanian officials.
Some of the stolen weapons were used in a shooting in November that killed two Americans and three others at a police training facility in Amman, F.B.I. officials believe after months of investigating the attack, according to people familiar with the investigation.
The theft and resale of the arms — including Kalashnikov assault rifles, mortars and rocket-propelled grenades — have led to a flood of new weapons available on the black arms market. Investigators do not know what became of most of them, but a disparate collection of groups, including criminal networks and rural Jordanian tribes, use the arms bazaars to build their arsenals. Weapons smugglers also buy weapons in the arms bazaars to ship outside the country.