World leaders had hoped to secure U.S. backing for tougher sanctions on Russia, which struck Ukraine with missiles and drones overnight.

Ahead of a meeting of the Group of Seven, Trump told reporters that ousting Russia from the talks in 2014 was a "very big mistake," adding that there would not be a conflict between Russia and Ukraine if President Vladimir Putin was still welcome at the summit.

Speaking during a press briefing with Canadian PM Mark Carney on June 16, ahead of the G7 summit in Kananaskis, Alberta, Trump stated that Moscow should never have been excluded from G8 after the invasion and annexation of Crimea in 2014.

KYIV, Ukraine (AP) — An overnight Russian missile and drone bombardment of Ukraine killed 15 people and injured 156, local officials said Tuesday, with the main barrage demolishing a nine-story Kyiv apartment building in the deadliest attack on the capital this year.

Ukraine received another 1,245 bodies of its soldiers killed in the war with Russia on Monday in the final stage of the repatriation of remains agreed at talks in Istanbul, Ukrainian officials said.