Pope Leo stressed the need to continue with dialogue aiming at a "just and lasting peace" during a meeting on Tuesday with Ukrainian President Volodymyr Zelenskyy, the Vatican said in a statement.
The pope "reiterated the need for the continuation of dialogue and expressed his urgent desire that the current diplomatic initiatives bring about a just and lasting peace," the statement said.
"In addition, the questions of prisoners of war and the need to assure the return of Ukrainian children to their families were also discussed", said the Vatican, which has mediated between Kyiv and Moscow on the children issue.
Zelenskyy met Leo at the papal residence of Castel Gandolfo, about 30 km south east of the Vatican and is due to see Italian Prime Minister Giorgia Meloni in Rome later in the day.
The talks with the pope and Meloni come amid efforts by Zelenskyy, with the help of European allies, to balance out a US-backed draft peace deal with Russia that is widely seen as favourable to Moscow.

Iran says it is reviewing US proposal to end war
UN Human Rights Council adopts resolution condemning Iranian attacks
273 million children out of school in 2026 UNESCO report
Russian attacks kill two in Ukraine's Kharkiv
Kuwait foils terror plot targeting state leaders
Iran rejects Trump's talk of negotiation as Israel and Iran launch airstrikes
Cyprus has opened discussion with UK over its bases, president says
Netanyahu seeks to avoid snap vote as Iran war gives no boost in polls
