Yassir Said Zabidat, a Sakhnin resident in his 20s, was arrested Wednesday on the suspicion of raising a photograph of assassinated Hezbollah terrorist mastermind Imad Mughniyeh during the annual Land Day procession in Sakhnin last week.
The Akko Magistrate's Court extended Zabidat's remand until Sunday.
The investigation is ongoing and police expect to find others who were involved.
Ten thousand protesters participated in the procession to mark the events of Land Day in Sakhnin in 1976, in which six demonstrators lost their lives in clashes with Israeli security forces.
At the end of the procession, two masked youths raised the photographs of Hezbollah leader Hassan Nasrallah and Mughniyeh.
Many participating in the demonstration expressed their opposition to the incorporation of posters of Hezbollah leaders, saying it could divert attention from the main goals of the ceremony and the significance of Land Day for Israeli Arabs.
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