MOSCOW/BRUSSELS - Europe's preliminary terms for mediation on the Ukraine issue are unacceptable, Kremlin spokesperson Dmitry Peskov said Tuesday.

Ukrainian President Volodymyr Zelensky met with British Prime Minister Keir Starmer, French President Emmanuel Macron and German Chancellor Friedrich Merz in London on Sunday to discuss next steps toward peace negotiations.

The parties put forward peace terms, including an immediate and full ceasefire, recognition of the current line of contact as the starting point for negotiations, post-ceasefire security guarantees for Ukraine, the freezing of Russian assets pending the conflict's resolution and the protection of European security interests.

ALSO READ: Russia says taking security measures amid NATO military buildup near its borders

"As for the Europeans' mediation role, they are still far from ready to act as mediators. Launching mediation by imposing preconditions on Russia is illogical, misguided, and, of course, unacceptable to us," Peskov said at a briefing.

Responding to a question regarding US mediation, Peskov said that Russian President Vladimir Putin and US President Donald Trump may hold phone talks as needed. At present, no new call has been arranged between the two sides.

Peskov added that the mediation process for Ukraine is currently on hold, but US mediators are still maintaining contact with Russia and Ukraine via existing channels. The spokesperson noted that no firm date has been set for US mediators to visit Moscow yet, but the Kremlin is happy to welcome them at any time.

Russia strikes Ukraine ammo depots, energy infra

Also on Tuesday, the Russian Defense Ministry said Russian forces launched strikes on ammunition and fuel depots as well as transport and energy infrastructure facilities used by the Ukrainian Armed Forces.

The Russian Armed Forces also struck temporary deployment points of Ukrainian armed formations and foreign mercenaries in 142 areas, the ministry said.

ALSO READ: Ukraine accuses Russia of attacking Chernobyl nuclear waste storage site

Air defense systems shot down nine guided aerial bombs, two rockets fired from the US-made HIMARS rocket system, and 551 fixed-wing drones, the ministry added.

EU proposes new sanctions against Russia

Meanwhile, the European Commission has proposed the 21st package of sanctions against Russia, targeting key sectors including energy, financial services and crypto, trade and, for the first time, fisheries, European Commission President Ursula von der Leyen said Tuesday.

According to a statement released by the Commission, the proposed measures include suspending the automatic adjustment mechanism of the oil price cap until next January, which would allow oil markets to stabilize while maintaining pressure on Russian revenues.

Thirty additional vessels would be added to the sanctions list, on top of the 632 already designated. For the first time, sanctions would also target vessels providing support services to the "shadow fleet," including bunkering operations.

READ MORE: Putin says Russia ready for peace deal with Ukraine

On financial and crypto-related measures, the Commission would expand transaction bans to 31 additional Russian banks, as well as to 20 banks, crypto firms, platforms and oil traders in third countries.

Von der Leyen also announced a new measure under the package to ban entry into the EU of individuals who have served in the Russian armed forces since the start of the Ukraine conflict.

The proposal still requires approval by all EU member states before it can enter into force.