The IDF, Shin Bet, Border Police and Israel Police arrested 21 suspects in the West Bank overnight on Monday. They are suspected of involvement in terrorist activities and violent disturbances against civilians and soldiers. The suspects have been transferred for questioning by the security forces.In addition, the forces confiscated machinery used to manufacture illegal weapons in the city of Yatta in the West Bank.They also arrested four suspects in the Etzion region after they allegedly started a fire near the settlement of Bat Ayin. Following their arrest, a violent riot broke out in the village of Beit Ummar. There were no casualties.