Gazans gathered near the border between the center of the Strip and Israel and set fire to tires on Sunday in protest of the security blockade. The IDF said it monitored the protesters, who did not enter the off-limits perimeter near the security fence. Army sources said that although the military was on full alert in the South, no violent disturbances or incidents have been recorded. Last week, Hamas fired several rockets from the Gaza Strip into the Mediterranean Sea. Hamas fires projectiles into the sea on a regular basis, as part of its weapons program. The launches are used by Hamas arms designers to experiment with various projectile models. The experiments naturally are closely monitored by the IDF and defense establishment.