Israeli authorities overnight Sunday-Monday extended the detention of Salah Hamouri, 37, under what is known as administrative detention, according to the documents.
The practice allows suspects to be detained for renewable periods of up to six months.
An Israeli military court sentenced Hamouri to administrative detention in March. It accused him of being a member of the Popular Front for the Liberation of Palestine (PFLP), and said he “endangers security in the region.”
Hamouri, who holds French citizenship, denies being a member of the PFLP.