KYIV, Ukraine (AP) — Russia is moving a significant part of its air defenses to protect a handful of prime targets, including Moscow, as Ukraine’s long-range drones continue to hammer sites deep inside the country, Ukrainian President Volodymyr Zelenskyy says.

Ukraine has in recent months stepped up its aerial campaign against Russian military installations and . Its success has caused and disrupted army supply lines, stalling after more than four years of fighting and .

The Associated Press