U.S. Secretary of State Hillary Clinton shakes hands on Sunday after arriving at United Nations headquarters in New York for a high-level meeting about the flood emergency in Pakistan. ((Chip East/Reuters) )

Nations and groups supporting Pakistan's democratic advances promised Sunday to give the country hundreds of millions of dollars more in flood aid, but some insisted the country must lead the way on recovery and account publicly for all funds.

The new pledges came two days after the United Nations made its largest disaster appeal ever, asking the world's governments to raise a total of $2 billion US for Pakistani flood victims.

The floods have killed more than 1,700 people and displaced millions of others since the raging waters began spreading across the country in July. Food, shelter and other emergency aid are still being supplied to displaced people in areas that remain under water.

During Sunday's high-level ministerial meeting at UN headquarters, Britain committed an additional $109 million toward relief efforts, more than doubling the $100 million pledged earlier, and the United States raised its pledge to $345 million. The U.S. total included $75 million that the U.S. Agency for International Development announced Sunday it was giving to the World Food Program.

The latest pledges were given at a meeting of the so-called Friends of Pakistan, which was formed two years ago to support the country's moves toward democracy.

European Union High representative Catherine Ashton said the EU had already contributed about $315 million and encouraged nations to give more.

Jean-Maurice Ripert, UN special envoy for Pakistan assistance, told The Associated Press after the meeting that members of the friends group are insisting that Pakistan take a leadership role in its own recovery and "make a certain number of decisions in terms of governance, accountability."

"We look to the Pakistani government to help shape a strategy that reflects the needs of its people," U.S. Secretary of State Hillary Clinton told the meeting, led by UN Secretary General Ban Ki-moon. "And Pakistan must also lead by instituting the reforms that will pave the way to self-sufficiency."

Clinton also urged Pakistan to "establish a structure to expedite and bring transparency, oversight and accountability to the reconstruction."

World Bank president Robert Zoellick said the relief push will work only if Pakistan "takes ownership" of reconstruction.

"We have to work through Pakistani institutions," he said. The World Bank last week raised its relief pledge to $1 billion.

The Asian Development Bank promised $500 million in loans and guarantees.