A Russian airstrike on a military training base in western Ukraine killed at least nine people and wounded 57, a local official said Sunday. The assault brought the war closer to the border with Poland after a senior Russian diplomat warned that Moscow considered foreign shipments of military equipment to Ukraine “legitimate targets.”

The governor of the Lviv region, Maksym Kozytskyi, said Russian forces fired more than 30 cruise missiles at the Yavoriv military range, located 30 kilometers (19 miles) northwest of the city of Lviv and 35 kilometers (22 miles) from Ukraine’s border with Poland.

The United States and NATO have regularly sent instructors to the range, also known as the International Peacekeeping and Security Center, to train Ukrainian military personnel. The facility has also hosted international NATO drills.

Russian fighters also fired at the airport in Ivano-Frankivsk, a city in western Ukraine located 250 kilometers (155.34 miles) from Ukraine’s border with Slovakia and Hungary. Mayor Ruslan Martsinkiv said Russia’s goal was “to sow panic and fear.”

On Saturday, Russia bombarded cities across Ukraine, pounding Mariupol in the south, shelling the outskirts of the capital, Kyiv, and thwarting the efforts of people trying to flee the violence.