Jordan police said it arrested on Wednesday five Jordanian men, including a terror convict, for planning to infiltrate into neighbouring Syria with automatic weapons.
"Police today raided a house in the border town of Torra and arrested five Jordanians and seized automatic weapons, including Kalashnikovs," a police statement said.
"Investigations showed that they obtained the arms to infiltrate the northern border."
A police spokesman confirmed to AFP that the suspects planned to go to Syria.
"One of the men was charged and sentenced to 15 years in jail in 2007 for plotting to carry out terror attacks. He was pardoned after spending time in jail," the statement said without elaborating.
Jordan, which says it is hosting more than 200,000 Syrian refugees, arrested more than a dozen jihadists in April and June as they tried to infiltrate Syria.
And last month, although Amman has beefed up its security along the border, a Jordanian soldier was killed in clashes with jihadists trying to cross over.