US and Russian negotiators held over 12 hours of talks in Riyadh to seek a partial ceasefire in Ukraine.
The talks focused on ending attacks on Black Sea shipping and protecting Ukrainian ports in Odesa, Kherson, and Mykolaiv.
US officials will meet Ukrainian representatives next to discuss civilian and energy infrastructure protection.
Both sides agreed in principle to a 30-day ceasefire on energy targets but no formal document has been signed.
Russia is demanding Ukraine drop its NATO ambitions and withdraw troops from four regions as a precondition for peace.
Despite negotiations, Russia launched missile strikes on Ukrainian cities and Ukraine carried out drone attacks on Russian facilities.
Officials discussed resuming the 2022 Black Sea Grain Initiative to allow Ukraine to export grain via its ports.
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