The armed wing of the Islamic Jihad Movement, the Quds Brigades, on Monday took the credit for firing two Quds-3 homemade missiles at Sderot settlement in the western Negev.The Brigades said that the shelling was a natural response to constant Israeli violations of the month-long truce with the Palestinians, violations that included daily arrests of Palestinian people in the West Bank and the killing of four citizens and wounding 30 others last Thursday in Ramallah.