The controversial U.S. and Israeli-backed plan aims to deliver aid directly to Palestinians through private security companies.

In the wake of the resignation of the Gaza Humanitarian Foundation chief a day earlier, questions have arisen surrounding the controversy behind the U.S.-backed group that has drawn criticism and widespread condemnation from other aid agencies operating in the territory.

A new U.S.-Israeli mechanism for delivering humanitarian assistance into Gaza that uses armed private contractors in favor of the United Nations and international aid agencies began operating on Tuesday.