Amid fresh rocket attacks by militants in the Hamas-run Gaza Strip, Israel’s Prime Minister has threatened a “disproportionate” reponse.There were no casualties from today’s rocket fire into Israel. Speaking at his weekly cabinet meeting, just days before a general election, Ehud Olmert took a tough stance. Vowing Israel would act according to “new rules”, Olmert warned its response would be “harsh” and “disproportionate.” The tense situation is also reflected at Gaza’s Rafah crossing with Egypt where security has been tightened in an apparent bid to prevent smuggling to Hamas. The group was sending a delegation to mediator Egypt to discuss permanent ceasefire proposals. Violence has flared sporadically since a truce took hold on Jan 18 at the end of Israel’s Gaza offensive.