Turkey said Saturday it was ready to push for local ceasefires in Ukraine and warned that neither Moscow nor Kyiv had the military means to "win the war".
The proposal from President Recep Tayyip Erdogan's top foreign policy adviser represented NATO member Turkey's latest effort to use its good relations with both Moscow and Kyiv to try and end Europe's bloodiest conflict since World War II.
Turkey hosted two early rounds of peace negotiations and helped strike a UN-backed agreement restoring Ukrainian grain deliveries across the Black Sea.
Erdogan has also held repeated rounds of phone consultations with Russian President Vladimir Putin and Ukrainian leader Volodymyr Zelensky aimed at finding common ground.
Erdogan's foreign policy adviser Ibrahim Kalin told reporters that the warring sides were unlikely to strike an "overarching peace deal" in the coming months.
Russia this week claimed its first major military success in six months by pushing its forces into Ukraine's eastern salt mine city of Soledar.
But Kalin said that the brutal cost of fighting might soon see both sides reconsider and accept localised truces in specific parts of the war zone.
"Turkey is willing to push for local ceasefires and small localised de-escalations," Kalin told reporters.
"Neither party is in a position to win the war militarily, on the ground."
- 'Security guarantees' -
Erdogan has been able to maintain open access to Putin by refusing to sign Turkey up to waves of Western sanctions imposed on Russia to punish it for its February invasion.
The Turkish leader has also criticised the West for supplying Kyiv with increasingly powerful weapons -- despite Ankara's own sale of combat drones and other military equipment to Ukraine.
Kalin said the war will end when the West -- and specifically the United States -- starts treating Russia as an equal with valid security concerns.
"What Russia wants is to be respected as a major player and to (avoid) having NATO in their backyard," Kalin said.
"Russia is interested in a new international architecture (with some) security guarantees," he said.
Washington flatly rejected Russia's demand for NATO to pull out of eastern Europe and provide other security guarantees in the weeks preceding the invasion.
- No NATO for Ukraine -
The war has only intensified Ukraine's desire to join NATO and strengthened its military ties with the West.
Kalin dismissed the idea that Ukraine could join the Western defence alliance any time soon.
"Ukraine is not going to join NATO but they need to get enough security guarantee from Russia," he said.
Putin's invasion also prompted Sweden and its Nordic neighbour Finland to drop decades of military non-alignment and apply to join Western military bloc.
The expansion would push NATO even closer to the Russian border and have the opposite effect of the one originally intended by Putin.
Their bids have been fast-tracked by the parliaments of 28 out of 30 NATO member states.
Hungarian Prime Minister Viktor Orban -- whose closeness to Putin has created tensions within the European Union -- has promised that his parliament would approve the bids once it returns from its winter break next month.
- Swedish standoff -
But Turkey has expressed repeated frustrations with what it views as Sweden's failure to follow through on commitments it made to Ankara at a historic NATO summit in Madrid in June.
Turkey wants Sweden to clamp down on Kurdish groups and extradite suspects it deems "terrorists".
Sweden has since approved a constitutional amendment that will make it possible to pass tougher anti-terror laws.
But Kalin said it would take at least until June for Sweden's parliament to vote through the measures and that Ankara was "not in a position" to act until all the laws went into force.
Their standoff escalated when a Kurdish group hung an effigy of Erdogan outside Stockholm's City Hall this week.
Swedish Foreign Minister Tobias Billstrom told AFP on Saturday that "it is up to Turkey to make a decision" on when it will ratify the two Nordic bids.
"We have delivered on all parts of the (June) agreement and are continuing to implement it," he said in response to Kalin's comments.