KYIV, Ukraine: A Russian drone barrage targeted the center of Kharkiv on Friday, injuring nine people and damaging a maternity hospital in Ukraine’s second-largest city, officials said.

Mothers with newborns were being evacuated to a different medical facility, Kharkiv Mayor Ihor Terekhov wrote on Telegram. He didn't say whether anyone at the hospital was among the injured. Russia’s recent escalation of long-range Shahed drone attacks on Ukrainian cities, which often also include ballistic and cruise missiles as well as powerful glide bombs, has brought renewed urgency to efforts to improve Ukraine’s air defenses after more than three years of war. “There is no silence in Ukraine,” Ukraine President Volodymyr Zelenskyy said after the Kharkiv bombardment. Kyiv, the Ukrainian capital, has endured repeated and intensifying drone attacks in recent weeks, as have many other regions of the country.

June brought the highest monthly civilian casualties of the past three years, with 232 people killed and 1,343 wounded, the U.N. human rights mission in Ukraine said Thursday. Russia launched 10 times more drones and missiles in June than in the same month last year, it said.

At the same time, Russia’s bigger army is pressing hard on parts of the 1,000-kilometer (620-mile) front line, where thousands of soldiers on both sides have died since the Kremlin ordered the invasion of neighboring Ukraine in February 2022.

Zelenskyy urged Ukraine’s Western partners to quickly enact pledges of help they made at an international meeting in Rome on Thursday.

Ukraine desperately needs more U.S.-made Patriot air defense systems to stop Russian missiles and more interceptor drones to bring down the Russian-made Shaheds, he said. Russia reportedly has expedited drone production, and Zelenskyy said Moscow plans to manufacture up to 1,000 drones a day.

Ukraine has asked foreign countries to supply it with another 10 Patriot systems and missiles, Zelenskyy said. Germany is ready to buy two systems and Norway has agreed to buy one, which will be passed on to Ukraine, he said.