Washington (CNN) - President Barack Obama confirmed Friday that he will team up with former presidents Bill Clinton and George W. Bush to discuss how best to encourage a broad-based national volunteer relief effort for Haiti.
The three leaders will meet Saturday at the White House.
Obama also said he has spoken on the phone Haitian President Rene Preval and "expressed ... deepest condolences for the people of Haiti and our strong support for the relief efforts that are under way."
Many communication lines in the stricken country remain down, Obama noted. Many people are still unaccounted for. "The scale of the devastation is extraordinary ... and the losses are heartbreaking," he said at the White House.
Obama noted that the aircraft carrier USS Carl Vinson had arrived off the coast of Haiti, and was preparing to help move water, food and other supplies to Port-au-Prince.
"I want the people of Haiti to know that we will do what it takes to save lives and to help them get back on their feet," he said.
The president warned, however, that it "will take time to establish distribution points so that we can ensure that resources are delivered safely and effectively and in an orderly fashion."