The head of the UN Relief and Works Agency for Palestine Refugees (UNRWA), Pierre Krahenbuhl will visit Yarmouk refugee camp in Syria on Saturday to discuss the latest development of its crisis, the agency reported. The organization said that Krahenbuhl will discuss in his "urgent mission" ways of aiding civilians trapped in the camp. "UNRWA is deepening concerns for the safety and protection of some 18,000 Palestinian and Syrian civilians, including 3,500 children, who are still in the camp on the outskirts of the Syrian capital, Damascus", the agency stated. It added that the lives of the camp residents are threatened "by the effects of the armed conflict in the area." The Yarmouk Camp is an unofficial refugee camp established in 1957 in Damascus, Syria. Populated by Palestinians, the camp has hospitals and a school and is considered the largest Palestinian refugee community in Syria. Since 2011, the camp has witnessed fierce clashes between the Free Syrian Army, the Popular Front for the Liberation of Palestine and terrorist groups.