According to the Italian newspaper La Repubblica , the detainee is a 59-year-old priest from the Czech Republic.
Apparently, he alleged that the bag where he was carrying the weapons belonged to another person and that these were for personal defense.
Later, a compatriot of the priest, 60 years old and apparently the owner of the bag, was also arrested.
Both had arrived in Rome on a pilgrimage from the Czech Republic by bus.
Milan Palkovic, the arrested priest, was accused of illegal possession of weapons.
Neither he nor his compatriot have a criminal record.