US First Lady Melania Trump has "successfully secured" a ceasefire between Russia and Ukraine in the Russian-occupied city of Oleshky, the White House has said.The statement said the truce in the "front-line war city on the brink of disaster" would begin on 29 October, though Ukraine and Russia have so far not commented."Oleshky's remaining population is comprised primarily of elderly residents who urgently need medical attention, medicine, food, and clean water," the White House said.Oleshky, in the Kherson region, was seized by Russian forces during the first days of Moscow's full-scale invasion in February 2022. Remaining residents have recently resorted to eating garden weeds to survive.