In other war news, Palestinian terrorists fired three mortar shells at two Jewish communities in Israel\'s southern Mediterranean coastal area last night… A bomb exploded this morning alongside an army patrol near the Kisufim entrance to Gaza… Arabs detonated a bomb against soldiers operating near the city of Tul Karem, in the northern Shomron. No injuries were reported in these incidents… Four suspected Palestinian terrorists were arrested this morning south of Kalkilye and transferred to GSS offices for questioning…