Russia launched more than 100 Shahed and decoy drones at Ukraine in nighttime attacks, the Ukrainian air force said Monday, after the Kremlin rejected an unconditional 30-day ceasefire in the more than 3-year war.

The announcement was made by leaders of Britain, France, Germany, Poland and Ukraine after a meeting in Kyiv, and a phone call with President Trump.

President Vladimir Putin said, according to a translation by the BBC: "We are determined to have serious negotiations with Ukraine. The purpose is to eliminate the root causes of the conflict and establish long-term, lasting peace with a historical perspective.