Russia has launched 574 drones and 40 missiles on Ukraine in one of the heaviest bombardments in weeks, Ukrainian officials say. One person was killed in a drone and missile strike on the western city of Lviv, while 15 others were reported wounded in an attack on the south-western Transcarpathia region.

President Donald Trump on Thursday appeared to offer a rationale for Ukraine to go on offense against Russia, notable rhetoric as the momentum around peace talks has stalled.

As negotiations over the war carry on, President Vladimir V. Putin is pushing hard with tactics that have evolved over three and a half years.

Russia has launched hundreds of drones and missiles on western Ukraine overnight in one of the heaviest bombardments in recent weeks, Ukrainian officials have said. Strikes were reported in Zaporizhzhia, Dnipropetrovsk, and Lviv, where one person was killed and others injured.

Oil prices rose by nearly a dollar a barrel on Thursday as Russia and Ukraine blamed each other for a stalled peace process, and as earlier U.S. data showed signs of strong demand in the top oil consuming nation.

Russian troops currently control about 20% of Ukrainian territory, but the Ukrainian constitution forbids giving up territory or trading land.

Russia has targeted Ukraine’s cities in the largest combined drone and missile attack in more than a month, only five days after Donald Trump’s meeting with Vladimir Putin in Alaska.

There are too many drones and only so many frequencies. Friendly jamming happens, sometimes as an accident, sometimes in panic.

Ukrainian officials say more than 19,000 children have been unlawfully deported to Russia or occupied areas, with reports suggesting the number could be far higher.