GAZA CITY (Ma'an) -- Over 1,000 Palestinians have been killed in Syria's ongoing internal conflict, a Palestinian group said Sunday.

The Action Group for Palestinians of Syria said in a statement that around 1,038 Palestinians have been killed in the 22-month Syrian conflict, which has claimed the lives of around 70,000 people and created hundreds of thousands of refugees, including Palestinians.

In January, UN Relief and Works Agency chief Filippo Grandi said conditions in Lebanese camps for Palestinian refugees were "horrible."

"The main problem they have is accommodation. They rent small, cramped, very unsanitary premises without running water, without ventilation, without electricity," he said.

In November, the PLO said that around 600 Palestinians had been killed in the Syrian conflict.

Syria hosts half a million Palestinian refugees, descendants of those admitted after the creation of Israel in 1948, and has always cast itself as a champion of the Palestinian struggle, sponsoring several guerrilla factions.