TOKYO - The conflict between Israel and Hamas may jeopardize already limited humanitarian resources needed in other parts of the world, a United Nations official said in Tokyo on Friday.

Filippo Grandi, the U.N. High Commissioner for Refugees, said his agency worries the war may spill beyond Israel and Gaza, which would add more pressure on surrounding countries like Lebanon and Egypt that are already experiencing refugee crises.

Humanitarian resources are "not endless," Grandi said at the Japan National Press Club. More crises leads to "less resources for everybody."

(Reporting by Francis Tang in Tokyo; editing by Christina Fincher)