Fearing winter will give Russian forces time to regroup and unleash a major attack, Ukraine is pushing for the Leopard battle tanks, which are held by an array of NATO members but whose transfer to Ukraine requires Germany’s approval.

A German government source said officials would lift their objections if the United States sends its own Abrams tanks.

German Chancellor Olaf Scholz, a Social Democrat, has been reluctant to send weapons that could be seen as provoking Russia.

Many of Germany’s allies say that concern is misplaced, with Russia already fully committed to war.

US Defence Secretary Lloyd Austin and the new German Defence Minister Boris Pistorius met in Berlin but there was no word of any progress ahead of a meeting of dozens of allies on Friday at Ramstein, the main US European air base.

Poland’s Prime Minister Mateusz Morawiecki said later on Thursday of the possibility of German approval, “I am moderately sceptical, moderately pessimistic because the Germans are defending themselves against this like a devil protects himself against holy water”.

Ukrainian President Volodymyr Zelenskiy made thinly-disguised criticism of Germany for its stance.

“‘I am powerful in Europe, I will help if someone else outside of Europe will also help.’ It seems to me that this is not a very correct strategy,” he said.

The Ramstein meeting is billed as a chance for North American and European allies to give Ukraine what it needs to defeat Russia in 2023 and a group of 11 NATO countries have already announced armoured vehicles and air defences.

But Ukraine says it needs heavy tanks to fend off Russian assaults and recapture occupied land.

“We have no time, the world does not have this time,” Andriy Yermak, head of the Ukrainian presidential administration, wrote on Telegram on Thursday.

“We are paying for the slowness with the lives of our Ukrainian people. It shouldn’t be like that.”

Dutch Defence Minister Kajsa Ollongren said she was confident a solution would be found for supplying modern battle tanks to Ukraine but that the Netherlands, which leases Leopard 2 tanks from Germany, would need a green light from officials in Berlin before deciding whether to contribute.

A German government source said officials had yet to receive a request from any country for permission to re-export the tanks.

The Leopard 2 tanks – workhorse of militaries across Europe and which Germany made in the thousands during the Cold War – are the only suitable option available in big enough numbers according to some allies.

US officials say they have no plans yet to send the Abrams, which is seen as using too much fuel for Ukraine’s strained logistics system to supply at the front.

Pistorius and Austin both spoke about the importance of supporting Ukraine ahead of their meeting but neither addressed the tank issue directly.

At a ceremony after being sworn in as minister, Pistorius said: “These are not normal times, we have a war raging in Europe. Russia is waging a brutal war of annihilation on a sovereign country, on Ukraine.”

Poland and Finland have already said they would send Leopards if Germany lifts its veto.

In a sign of mounting frustration, Poland suggested it might do so even if Germany tries to block it.

-AAP