Mr. Banna's other son, Ahmed, who claimed to have spoken to the insurgents, said he had been misquoted in the Jordanian newspaper.
Jordanian newspapers ran front-page photos of the arms on Wednesday.
Most Jordanian newspapers and news stations are situated in Amman.
The Jordanian newspaper al-Shihan prints the cartoons.
In an interview with a Jordanian newspaper, he said he decided to return to quash press speculation that he was planning to defect.
Jordanian newspapers, serving a readership that has close family and business ties with Palestinians in the West Bank, print the names of every Palestinian casualty.
However, Al Asswak, a leading Jordanian newspaper that reflects his views, just ran an editorial headlined, "Likud victory can save the peace process."
"We are ready for a battle of steadfastness and liberation until the end," General Aoun said in an interview with a Jordanian newspaper, Al Rai.
"The foundation for the state of Palestine was launched from Aqaba," said an editorial in the Jordanian newspaper Al Dustour today.
Early this year Al-Balad, a Jordanian newspaper, quoted him as saying that "jihad" had at last discovered how to win the holy war - lethal germs.