(ANSA) - BELGRADE, MAR 16 - "The delegations of Poland, Slovenia and Czechia have returned safely from Kyiv to Poland," the Polish government's spokesman Piotr Mueller tweeted today, quoted by the Slovenian news agency STA. The Slovenian Prime Minister Janez Jansa, and his Polish and Czech counterparts, Mateusz Morawiecki and Petr Fiala, were the first foreign leaders to visit Ukraine since the start of the invasion, STA recalled. (ANSA).