About 20 men, some carrying assault rifles, tore up large plastic tents and burned storage facilities at the site, where tens of thousands of children are due to attend camp sessions, said Ibrahim Elewa, a private guard who was on duty when they struck.
Two days earlier, a previously unknown militant group, "The Free of the Homeland," issued a statement criticizing the camp's organizer, the United Nations Relief and Works Agency (UNRWA), for, "teaching schoolgirls fitness, dancing and immorality."
Fundamentalist Muslims, or Salafis, whose agenda of global or holy war against the West is against Hamas's nationalist goals, have stepped up attacks in the Gaza Strip over the past several months, targeting Hamas security men and offices.
"No doubt in my mind that it is vandalism linked to a certain degree of extremism. It is an attack on the happiness of children," John Ging, UNRWA's director of operations in Gaza, told reporters at the damaged camp.
http://www.reuters.com/article/idUSTRE64M0RT20100523