At least 25 U.N. employees have been arrested by Israel for participating in or aiding Palestinian terrorist attacks, according to the Associated Press.

Peter Hansen, head of the U.N. Relief and Works Agency for Palestinian refugees (UNRWA), admitted to the AP that some of the agency’s 24,000 Palestinian employees are members of Hamas and other terrorist organizations. "I don’t see it as a crime," Hansen said.

Both the military and political wings of Hamas are listed as terrorist organizations by the U.S. State Department and the European Union.

Since 1950, UNRWA has been tasked with providing "humanitarian" assistance to Palestinians living in Israel. This assistance includes providing food and helping with medical care.

The Israeli army has often complained that Palestinians were using U.N. vehicles and other U.N. resources to move weapons and organize attacks on Israeli targets.

"We are talking about an organization [UNRWA] that in the past four years has actually been kidnapped and hijacked by the these terrorist groups," Raanan Gissin, an adviser to Israeli Prime Minister Ariel Sharon, told the AP.

The United Nations has long been hostile to Israel. In 1975, the U.N. General Assembly approved a resolution declaring "Zionism is racism."