KYIV, Ukraine (AP) — Leaders from Europe and Canada held talks Tuesday on U.S.-led peace efforts to end the nearly four-year war between Russia and Ukraine, as Moscow and Kyiv sparred over Russian claims, denied by Ukraine, of a mass drone attack on a lakeside residence used by President Vladimir Putin.

Moscow said a Ukrainian drone attack targeted a residence of President Vladimir V. Putin, which Ukraine denied, accusing the Kremlin of fabricating an excuse not to make peace.