Former Russian President Dmitry Medvedev has warned of World War III after US President Donald Trump criticised his counterpart Vladimir Putin over stalled peace talks attacks on Ukraine.“Regarding Trump’s words about Putin “playing with fire” and “really bad things” happening to Russia. I only know of one REALLY BAD thing — WWIII. I hope Trump understands this!” Medvedev said.Trump had, on Tuesday, warned Putin of serious consequences saying, “What Vladimir Putin doesn’t realize is that if it weren’t for me, lots of really bad things would have already happened to Russia, and I mean REALLY BAD. He’s playing with fire!”The US president’s frustration with Putin has grown after Russia’s continuous aggression against Ukraine leading to serious loss of life and property. His recent remarks follow his earlier condemnation of Putin made in response to Russia’s unprecedented drone attack on Kyiv over the weekend that left at least 13 people dead.“I’ve always had a very good relationship with Vladimir Putin of Russia, but something has happened to him. He has gone absolutely CRAZY!” Trump posted on Sunday night.Following Russia’s largest air assault on Ukraine since the war began—launching 367 drones and missiles at multiple cities including Kyiv—former Trump said that he was considering additional sanctions on Moscow, according to Reuters.Moscow, meanwhile, has shown no indication of de-escalating. Russian officials, on Tuesday, claimed Ukraine was attempting to “disrupt” peace efforts, asserting that the recent airstrikes were retaliation for Ukrainian drone attacks targeting Russian civilians.