Just two weeks after Israel pulled its troops out of Gaza the Palestinian territory is witnessing a major flare-up in the conflict between the two sides.Israel has launched air strikes at what it says are militant targets in response to rocket attacks by Palestinian extremists. Two Hamas members were killed in one, in another more than 20 people were wounded when Israeli aircraft fired on Hamas offices which were in the grounds of a school in Gaza city. The strikes reportedly came soon after Israeli ministers, meeting in an emergency session, decided to resume targeted assassinations of Palestinian militants. The defence minister also said a ground offensive into Gaza was being considered. The Israeli army says arond 40 rockets have been fired into Isreal from Gaza since Friday when an explosion killed 15 people at a Hamas rally. Israel denied militants’ claims it was behind the blast. The Palestinian Authority said the incident appeared to have been caused by the accidental detonation of explosives being carried by Hamas guerrillas. The sudden escalation in violence has undermined hopes the Israeli withdrawal from Gaza could lead to further peace moves.