TEL AVIV, June 24 (Reuters) - Israel said on Thursday it would ease restrictions on trade and fisheries in the Gaza Strip that had been tightened during 11 days of fighting with the Palestinian enclave"s Hamas rulers last month. Israel keeps tight controls over Gaza"s borders, with support from neighbouring Egypt, citing threats from Hamas. The Israeli restrictions were intensified during the May fighting - halting Gaza exports, restricting imports of raw materials and limiting the area that Palestinians are permitted to fish. With an Egyptian-mediated truce largely holding, Israel on Monday allowed a limited resumption of commercial exports from Gaza. But Hamas demanded a wider easing of curbs and held out the possibility of resuming hostilities. read more Starting from Friday, Israel will "expand the fishing zone in the Gaza Strip from six to nine nautical miles, and (approve) the import of raw materials for essential civilian factories," COGAT, a branch of Israel"s defence ministry, said. The new measures are "conditional upon the preservation of security stability", COGAT said in a statement. At least one factory in the Strip, Pepsi Gaza, had shut down due to Israeli restrictions on raw materials imports, including carbon dioxide gas. read more COGAT did not say which raw materials would be allowed in. Egypt and the United Nations stepped up mediation last week after incendiary balloons launched from Gaza drew retaliatory Israeli air strikes on Hamas sites, challenging the fragile ceasefire. At least 250 Palestinians and 13 in Israel were killed in the May fighting, which saw Gaza militants fire rockets towards Israeli cities and Israel carry out air strikes across the coastal enclave.