International aid is arriving too slowly for flood-ravaged Pakistan, and some aid organisations are beginning to run out of resources, the United Nations has said.(..) But the UN says that is not enough: Aid agencies say they need millions more to provide shelters, blankets, clean water and other supplies to the 20 million people affected by the floods. The World Food Programme has warned that it needs more money to support Pakistan's food supplies, which are "under significant pressure".