Ukrainian President Volodymyr Zelenskyy condemned Russia’s latest deadly attacks on Kyiv while visiting Serbia on Saturday.

Four people, including a child, were killed in overnight strikes on Kyiv and the surrounding region, while Ukrainian forces targeted Russian oil facilities.

Zelenskyy met with Serbian President Aleksandar Vucic during his first official visit to Serbia in eight years.

The leaders discussed strengthening bilateral ties and cooperation, as well as their countries’ efforts to join the European Union, the AP has reported.

Meanwhile, Kyiv continues to face frequent Russian drone and missile attacks, while Ukrainian strikes on Russian oil facilities have contributed to fuel shortages.