KYIV, Ukraine (AP) — Drones that the Kremlin said were launched by Ukraine flew deep inside Russian territory, including one that got within 100 kilometers (60 miles) of Moscow, signaling breaches in Russian defenses as President Vladimir Putin ordered stepped-up protection at the border.

Officials said the drones caused no injuries and did not inflict any significant damage, but the attacks on Monday night and Tuesday morning raised questions about Russian defense capabilities more than a year after the country's full-scale invasion of its neighbor.

Ukrainian officials did not immediately cla...