(KUNA) -- Al-Aqsa Martyrs Brigades, the military wing of Fatah movement, on Friday fired four "Yasser" missiles at Sederot and Western Negev areas south of Israel.The brigades announced in a statement that one of its groups launched four "Yasser" missiles at the two areas, adding that the Israeli enemy acknowledged the falling of such missiles. According to the statement, the launching of the missile came in response to the repeated "Zionist violations" of calm and to the daily pursuit of the brigades' leaders in the West Bank and the Gaza Strip as well as to the storming of the holy Al-Aqsa Mosque. The statement quoted the brigades as warning that any harm done to the Secretary General of the Islamic Jihad movement Dr Ramadan Shalah would be confronted by an unprecedented reaction.