A "two week" deadline imposed by U.S. President Donald Trump to see if Russia is serious about peace in Ukraine has come and gone, with Moscow's escalation of attacks on civilians during this period failing to draw the slightest condemnation from the White House.

Russian President Vladimir Putin told his US counterpart Donald Trump Saturday that Moscow was ready to hold a fresh round of peace talks with Kyiv after June 22, once the sides complete exchanging prisoners and soldiers' bodies.

Putin "will continue this game" until Trump hits the Kremlin where it hurts, Oleksiy Goncharenko, a Ukrainian parliamentarian for the country's southern Odesa region, told Newswee