India, July 5 -- US President Donald Trump held separate phone calls with Russian President Vladimir Putin and Ukrainian President Volodymyr Zelensky on Saturday, using the conversations to push his offer to help broker an end to the war in Ukraine.

The calls, held ahead of a key NATO summit in Turkey, touched on battlefield developments, peace negotiations and the role Washington could play in reviving talks between Moscow and Kyiv.

According to the Kremlin, Trump reiterated his willingness to help bring an end to the conflict during an 90-minute phone call with Putin, a news agency Reuters report said.

Putin used the call to congratulate Trump on the 250th anniversary of US independence, Kremlin foreign policy aide Yuri Ushakov said....