The United Nations is gravely concerned about the effects of Israel's cutback in fuel supplies to the Gaza Strip. UN organizations aiding Palestinians issued a statement warning that Israel's refusal to ship in enough fuel is having negative effects on health, education and transportation. The UN groups raised their concerns Tuesday, the night before Israel was planning to resume shipments of fuel for Gaza City's power plant. Israel halted fuel shipments last week after Palestinian gunmen killed two Israeli fuel depot workers. Israel has been cutting back on supplies allowed into Gaza for months, trying to pressure Gaza's Islamic Hamas government to stop daily rocket attacks. The UN also denounced the attack on the fuel depot.