UNRWA, the United Nations body that exists solely to serve Palestinians "refugees," has yet again discovered a terror tunnel running under one of its schools in the Hamas-ruled Gaza Strip.

UNRWA reportedly informed Israel immediately regarding the discovery. In the past, UNRWA has not been so forthcoming.

A statement released by the organization read: "The presence of a tunnel underneath an UNRWA installation, which enjoys inviolability under international law, is unacceptable. It places children and agency staff at risk."

The problem is that's precisely what Hamas wants – to put ht children and agency staff at risk. Because, doing so accomplishes one of two things: either Israel will avoid targeting Hamas operations under such a sensitive target, or children and agency staff will be killed in the cross-fire, providing ammunition for Hamas' PR campaigns against Israel.

The latest tunnel was discovered two weeks ago, and the school was immediately closed until the tunnel could be sealed.

Israel Ambassador to the UN Danny Danon suggested it was time for more drastic measures:

"Yet another terror tunnel under an UNRWA schoolyard. This is what Hamas rule looks like and this is more proof of the double war crime committed as terror tunnels are built to attack Israelis, while using the children of Gaza as human shields.

"We cannot accept a situation in which UNRWA schools are used as terror bases.  This dangerous incident must not be ignored and strict oversight is needed to ensure that UN facilities are not used to protect terrorists."

PHOTO: An UNRWA school in Gaza (Emad Nassar / Flash90)