 Qassam rockets were continually fired into Israel, and during the early hours of June 29, several Israeli naval vessels shelled Qassam locations.Thousands of leaflets advising civilians to leave their homes were dropped on inhabited areas in the northern Gaza Strip towns of Beit Lahia and Beit Hanoun which Israel had identified as frequent launch sites for Qassam rockets.An explosion was reported in Gaza City, and eyewitnesses reported it was at the Islamic University.