KYIV, Ukraine (AP) — Russian missiles hit a Ukrainian army training ground, killing three soldiers and wounding 18 others, authorities said, targeting Ukraine’s efforts to make up a severe manpower shortage in the nearly 3½-year war.

The attack, just hours after President Trump gave the Kremlin a new deadline to work toward ending the war, was part of a wave across the country, the authorities said.

The Ukrainian military said a Russian missile strike on a training facility in the north of the country killed at least three reservists and injured 18.