Ukraine President Volodymyr Zelensky arrived at the G7 summit on Tuesday, hoping to impress upon US leader Donald Trump that Ukraine's fortunes in its conflict against Russia have improved as he pushes for greater international support.

Zelensky was greeted by French President Emmanuel Macron, who is hosting the June 15-17 gathering in the lakeside resort of Evian-les-Bains.

Trump arrived in France on Monday, buoyed by concluding a preliminary deal to end the conflict with Iran, with a formal signing targeted for Friday.

Trump said he would now turn to the Ukraine conflict, saying both Zelensky and Russian President Vladimir Putin had signalled they were willing to strike a deal.

"We had a very good conversation yesterday with President Zelensky and President Putin, and I think maybe we can do something there. I really do. I think they're both open to it."

European diplomats hope to convince Trump that previous US positions on possible terms of a deal were overly favourable towards Moscow, particularly now that Ukraine's drone incursions have put Russia on the defensive.

European Commission President Ursula von der Leyen on Monday said Ukraine was gaining ground and hitting targets deep inside Russia, whose "war economy has never been as weak".

Zelensky took part in the first session of the day dedicated to "Building peace in Ukraine" and may talk separately with Trump.

He was also due to meet other G7 leaders individually.

With negotiations stalled, Zelensky is pushing for renewed momentum and a greater European role.

He said on Monday he had offered to meet Putin at the G7 summit, but that Putin was not ready for peace talks.

European leaders were also set to warn Trump that a superficial interim deal with Iran risks entrenching Tehran's nuclear and ballistic missile programmes.

Macron said the priority was to ensure there is a "solid, serious agreement that is finalised".

He said Tuesday's working lunch would focus on the safe reopening of the Strait of Hormuz, including a possible Franco-British-led maritime mission.

It would also seek to identify alternative energy routes to bypass the waterway, which Iran has largely closed since shortly after it was attacked by the United States and Israel at the end of February.

Trump said the strait would be "completely open" on Friday.

Leaders from the United Arab Emirates, Qatar and Egypt were due to attend Tuesday's talks.

They were not expected to get into detailed discussions on Iran's nuclear programme, but to outline their expectations, diplomats said.

The interim deal should open a 60-day window for complex technical negotiations that would include the fate of Iran's stockpile of highly enriched uranium and the lifting of international sanctions.

However, European allies fear an inexperienced US negotiating team may fail to secure a robust nuclear agreement or address Iran’s ballistic missile programme in the next phase, potentially creating a prolonged standoff.

France, Britain and Germany want a role shaping the coming talks after being sidelined in recent months. (Reuters)


Edited by Tony Sabine