DAMASCUS, Syria (AP) — The chief of the United Nations relief agency supporting Palestinian refugees said Tuesday he is “deeply disturbed and shaken” by the despair and destruction he’d seen in a besieged camp in the Syrian capital.

The Yarmouk refugee camp, located in southern Damascus, is an opposition enclave under the tight blockade of forces loyal to President Bashar Assad. More than 100 people have died in Yarmouk since mid-2013 as a result of starvation and illnesses exacerbated by hunger or lack of medical aid, according to U.N. figures.