"The UN General Assembly approved the USD500 million relief fund in December, a tenfold increase over the existing USD50 million fund that proved inadequate for coping with an unprecedented string of natural disasters in 2005," the AP said.
Croatia is among countries that have already donated funds.
"Britain was the largest contributor with a $70 million pledge. The other donors were Sweden, Norway, the Netherlands, Ireland, Denmark, Luxembourg, Switzerland, Finland, France, Greece, Estonia, Croatia, Sri Lanka, Liechtenstein, Grenada, Armenia, Mexico, Egypt, South Korea and Pakistan" the news agency said.
International humanitarian agencies have criticised some world powers, including "the United States, Japan, Australia, Italy and Canada for failing to contribute so far, noting poorer countries like as Grenada and Sri Lanka have pledged money".