The Kremlin has hit back after US president Donald Trump compared the war between Russia and Ukraine to “kids fighting in a park”. Spokesperson Dmitry Peskov said on Friday that Trump had a right to his own opinion, but for Russia the conflict was “an existential matter about securing its own security and the future of the country.”

On June 1, Ukraine targeted several Russian air bases using first-person view (FPV) drones, cheap aerial vehicles which are remotely operated by pilots using camera feeds. According to reports, Ukraine used machine-learning algorithms to guide the drones to the target area.

KYIV, Ukraine (AP) — Russia struck Ukraine with a thunderous aerial bombardment overnight, further dampening hopes that the warring sides could reach a peace deal anytime soon days after Kyiv embarrassed the Kremlin with a surprising drone attack on military airfields deep inside Russia.

President Volodymyr Zelenskyy said Defense Minister Rustem Umerov would sit down with Russian officials at the second round of peace talks on Monday.

But halting progress, ever-more deadly drone attacks and unmoving negotiating positions seem to have taken their toll. On Thursday, Trump used a striking analogy to concede the warfare was nowhere near over, and that he did not, at that moment, feel it was best to intervene.

Assaults in Russia and Ukraine have shown major military powers that they are unprepared for evolving forms of warfare, and need to adapt.

Satellite photos analyzed by The Associated Press show seven destroyed bombers on the tarmac at a Russian air base in eastern Siberia.

The strikes help Kyiv "negotiate from a position of strength," Oleksandr Merezhko, the head of Ukraine's parliamentary foreign affairs committee, told Newsweek.