Juelz is the Latest Rapper to Visit the Pen

Rapper Juelz Santana was arrested this week in New Jersey on suspicion of making terrorist threats ... P.A.C.E. has learned.

Law enforcement sources wouldn't specify what constituted the threats, but they tell us, Juelz -- real name LaRon James -- was also booked for disorderly conduct.

According to law enforcement, the rapper refused to let officers search his vehicle, which was later impounded by cops.

Juelz was released hours later on $46,500 bail. Calls to his reps were not returned.