"Yarmouk and its inhabitants have endured indescribable pain and suffering over years of conflict", said Pierre Krahenbuhl, UNRWA's commissioner-general.
The camp has been under a government-imposed siege since 2012.
Aid groups have decried the situation of Palestinian refugees and Syrians in the area, as activists accuse forces loyal to Assad of using surface-to-surface missiles, barrel and cluster bombs, as well as mortar fire. Al Jazeera reports more than half of the refugee camp has been destroyed. Opposition sources, cited by Reuters, claimed that the army was engaged in fighting with Islamic State militants on the outskirts of Yarmouk camp, where up to 2,000 militants are encircled.
Following their victory in capturing the rebel-held eastern Ghouta last month, regime troops have moved their focus towards Yarmouk and the surrounding neighbourhoods.
Syrian forces allegedly used chemical weapons during a seven-week standoff that resulted in an evacuation deal between Russian Federation and Jaish al-Islam, the last armed opposition group to have remained in Eastern Ghouta - which was under rebel-control since 2012.
French Foreign Minister Jean-Yves Le Drian has warned of a humanitarian disaster in the city.
Before the outbreak of the Syrian civil war in 2011, Yarmouk was home to around 160,000 Palestinian refugees - people who had been displaced from their homes in modern-day Israel during the 1948 war, and their descendants.
Koulibaly keeps Napoli in the running for Serie A
Kalidou Koulibaly headed in a late victor in Turin to send Napoli to within a point of Juventus in the race for the Serie A title. Milinkovic-Savic had headed in Stefan Radu's cross in the 32nd minute and Stefan de Vrij headed in a corner 10 minutes later.
Congress grills EPA chief over allegations of ethics violations
However, Pruitt maintained that he was "not aware" of the amounts, or that he was bypassing certain procedures. "She is a friend". Sarah Greenwalt, Pruitt's 30-year-old senior counsel, received a raise of over $66,000, bringing her salary to $164,200.
Republican wins special House race in Arizona GOP stronghold
Republicans defended a congressional seat in Arizona on Tuesday, avoiding another special election upset in a strong GOP district. The call touted Lesko as a Republican in line with Trump on immigration and urged voters to get out and vote for her early.
James Comey book sells more than 600000 copies in first week
I write at the end of my book that Trump's presidency is a forest fire ... they do damage but things grow in the wake of them. Higher-than-expected demand led Macmillan imprint Henry Holt & Co to order up 2.1 million copies in its first week.