"For two years many observers have said that the Palestinian society was at the breaking point. Where else could people live with 60 percent unemployment, 60 percent poverty rate without seeing society literally break down," he said.

"I think it is a major miracle that the Palestinians have had the coping mechanisms, that they have been able to get through this crisis so far without an explosion or without an implosion," Hansen added.

He appealed to the international community and donor countries to keep the flow of funds to UNRWA to enable the agency to care for 3.9 million Palestinian refugees in the occupied territory as well as Jordan, Syria and Lebanon.

"How long can you go on expecting society to break down? There must be limits somewhere," Hansen stressed, saying donor countries had a responsibility to bear.

"I just hope that the international community will make it certain that we do not approach these limits ... because an explosion or an implosion in the area would be extremely destabilizing throughout the region," he warned.

According to Hansen UNRWA has spend more than 2.5 million dollars "of what should be a purely humanitarian budget" in additional port and storage charges of humanitarian goods and equipment over the past two years.