President Donald Trump met with Russian President Vladimir Putin in Alaska Friday for a major summit that many were hopeful would lead to negotiations that end Russia's war in Ukraine.

Ukrainian President Volodymyr Zelenskyy says he will meet U.S. President Donald Trump in Washington on Monday after a Russia-U.S. summit concluded without an agreement to stop the fighting in Ukraine after 3 1/2 years.

Russian Foreign Minister Sergei Lavrov held calls on Saturday with his Turkish and Hungarian counterparts, the Russian foreign ministry said, hours after a summit between the U.S. and Russian presidents yielded no deal on ending the war in Ukraine.

The problem is that they have no strategy of their own for ending the Ukraine war, other than hoping to contain Russia over the longer term.

Russian President Vladimir Putin and North Korea's leader Kim Jong Un have vowed to strengthen cooperation, days ahead of Putin's summit in Alaska with Donald Trump, Pyongyang's state media reported Wednesday.