Jordanian security services revealed that explosives were seized in a commercial store in the Abu Alanda area, a neighborhood east of Amman.
Security sources say some of the arms are bound for the neighboring West Bank, adding that they have arrested several Jordanians linked to Palestinian militants.
Most of the clandestine flow of arms into the country has been bound for the neighboring West Bank, Jordanian officials say.
An official said that the administration had been working toward lowering the risk that US troops face in Syria, Iraq and Jordan.
The joint press conference took place shortly after an international conference discussing humanitarian response to Gaza concluded in Jordan.
Using examples of wounded children with no surviving family, he called on the Arab states in attendance to increase their volume of aid to Gaza.
While Jordan has had a peace treaty with Israel for nearly 30 years, the kingdom’s identification with the Palestinian people still runs strong.