Russian President Vladimir Putin told President Donald Trump in a phone call Wednesday that he was obligated to respond to Ukraine’s weekend drone attack, Trump said, setting up a potential escalation in the conflict just as the US president hopes to broker an end to the war.

Trump said his latest call with Putin wouldn't lead to "immediate peace" as he relayed the Russian leader's plans to retaliate against Ukraine.

Russia launched a massive, hours-long missile and drone attack across Ukraine on Friday, June 6th, killing three emergency responders in Kyiv. -This assault, involving a reported 407 drones and 44 ballistic and cruise missiles,