Israeli forces arrested 21 Palestinians in the West Bank overnight and clashed with locals, sources said Wednesday. In the Salfit district, Israeli forces detained ten Palestinians. The Fatah movement said in a statement that six of its activists were arrested in Qarawat Bani Hassan in the district, saying they were detained for protest action during the recent Israeli assault on Gaza. "Israeli forces, after the war on Gaza came to an end, started to target different West Bank neighborhoods and towns seeking to take revenge on activists who joined protests in support of the Gaza Strip," the statement said. It identified the detainees as Jumaa Abd al-Raziq Rayyan, Jumaa Kanaan Rayyan, Wahbi Mufid Rayyan, Yusri Nafiz Rayyan, Hazim Yaqub Asi, and Khalil Azzam Asi. Locals added that Israeli forces stormed the village of Deir Ballut in the Salfit district and detained Ahmad Abd al-Khaliq Rashid Mustafa, 26, his brother Wahib, 22, Yousef Shofan Yousef Mousa, 21, and Muhammad Said Theib Abu Kheir, 21. Meanwhile, witnesses said an undercover Israeli squad raided the Conference Palace near Solomon's Pools south of Bethlehem and detained a security guard, Amir Sami Hajajra, 33. Israeli forces also detained a university student, Khalil Ibrahim Uqeila, 22, at the Container Checkpoint between Bethlehem and Ramallah. Separately, Israeli troops raided the Jenin-area town of Qabatia and detained Luay Ahmad Mustafa Sabaana, 21, and Yousef Ali Kamil, 25. Israeli forces also stormed al-Fara refugee near Nablus and detained 25-year-old Zakariyya Mahmoud al-Abbadi after ransacking several homes, locals said. The sources said clashes broke out between the soldiers and local youths in the camp. Israeli soldiers fired tear gas and stun grenades and Palestinians threw stones and Molotovs. Clashes also took place in the town of Deir Abu Daif east of Jenin, with several residents suffering from excessive tear gas inhalation and another lightly injured after being hit by shrapnel from an Israeli stun grenade. An Israeli army spokeswoman said 21 Palestinians were detained overnight -- two near Nablus, nine near Qalqiliya, five near Bethlehem, one in Ramallah, two in Hebron, and two "Hamas operatives" near Jenin.