KYIV, May 18 (Reuters) – Ukrainian officials reported Sunday that the most extensive Russian drone assault since the start of the full-scale invasion in 2022 left a woman dead in the Kyiv region and at least three others wounded. This intensified attack came on the heels of Friday’s peace negotiations. Ukraine’s air force confirmed that by 8 a.m. local time (0500 GMT), Russia had launched 273 drones, focusing its offensive largely on the central Kyiv area as well as the eastern Dnipropetrovsk