The UN humanitarian agency said that as of May 15, 1,849 people had been killed and 7,394 had been injured, citing numbers from Yemen health facilities.
The UN has repeatedly stressed that many of those injured and killed do not pass through health facilities, meaning the actual toll could be higher.
The announcement came as witnesses reported that Saudi-led warplanes hit Yemeni Houthi fighters and the civilians in Sanaa, in the first strikes on the capital since the end of a five-day humanitarian "truce" on Sunday.
Spokesperson for the UN World Food Programme [WFP], Elisabeth Byrs, told reporters that, "The humanitarian pause in Yemen was not long enough to reach all those in need of food".
She said the WFP had managed to deliver food to only 400,000 people during the pause, just over half of the 738,000 it had aimed to help.
"WFP is appealing for a series of predictable breaks in the conflict to deliver desperately needed aid," she said.
UN refugee agency spokesperson, Adrian Edwards, meanwhile said the humanitarian pause had allowed all six of the planned UNHCR aid-loaded flights to land safely in Sanaa.
The pause, he told reporters, had also allowed the agency to carry out around 40 assessments on the ground across Yemen, which had "exposed enormous difficulties for thousands of civilians displaced by war."
He also said that the assessments revealed that the Saudi aggression had forced far more people to flee their homes since previously thought.
Edwards further said that the number of people displaced since late March within the conflict-ravaged country is now estimated to be more than 545,000, compared to the 450,000 announced recently last Friday.
They join some 330,000 people already internally displaced before the latest conflict, and some 250,000 Somali refugees inside Yemen believed to be impacted by the fighting, Edwards said.
