Trump says he will call Putin on Monday to discuss stopping Ukraine war
The US and Russian leaders are expected to discuss a ceasefire, as well as the possible summit between themselves.
Moscow has moved slower than Trump would like, but it welcomed the American efforts at mediation, in a call on Saturday between the US Secretary of State Marco Rubio and his Russian counterpart Sergei Lavrov.
EPA
Russia launched a full-scale invasion of Ukraine in February 2022.
Following the talks in Istanbul, Ukraine also reiterated its call for a full and unconditional ceasefire.
According to a Ukrainian official, the Kremlin had made "new and unacceptable demands including insisting Kyiv withdraw its troops from large parts of its own territory", he said, in exchange for a ceasefire.
The head of the Russian delegation, Putin aide Vladimir Medinsky, said they were satisfied with the talks and ready to continue contact.
Hours later, a Russian drone hit a passenger bus in the Sumy region, killing nine people - prompting Zelensky to demand stiffer sanctions on Moscow.
He said the attack on the bus was "a deliberate killing of civilians". Russia has not commented, but state media reported that forces had hit a "military staging area" in Sumy province.
