Which two countries are engaged in ceasefire talks regarding the Black Sea?

Explanation

– The United States and Russia engaged in talks concerning a potential ceasefire covering Black Sea maritime operations amid the ongoing Russia-Ukraine war.
– The discussions focused on safeguarding commercial shipping and energy infrastructure in the Black Sea region.
– Such talks formed part of broader, intermittent diplomatic efforts to de-escalate specific aspects of the conflict without resolving the wider war.
– The Black Sea has been a critical route for global grain exports, making its security a matter of significant international economic concern.