Ukrainian drones launched a significant overnight airstrike, hitting a Russian military electronics facility and causing disruptions to mobile internet services near Moscow, officials reported early Wednesday.

Andrei Klychkov, the Governor of the Oryol region, stated that a “large-scale enemy drone attack” struck the town of Bolkhov, located approximately 200 kilometers from the Ukrainian border, and inflicted damage on the Bolkhovsky Semiconductor Devices Plant.

This facility, which manufactures components for Russia’s electronic warfare systems, is subject to sanctions imposed by the U.S. and Ukraine. Klychkov confirmed that there were no injuries reported.

Russia’s Defense Ministry claimed it had intercepted and destroyed 159 Ukrainian drones across nine regions, including Moscow.

According to the Telegram news channel Astra, residents in the Moscow, Vladimir, and Lipetsk regions experienced mobile internet disruptions during the attacks. Lipetsk region Governor Igor Artamonov mentioned on Telegram that the military opted to temporarily suspend mobile internet services for security purposes, and access would be restored as soon as the situation permitted.

The drone strikes occurred while the Kremlin announced that President Vladimir Putin was visiting the Kursk region, though it was not immediately clear if his visit took place at the same time as the airstrikes.

In related news, Ukraine’s national guard reported that six soldiers were killed and at least ten others were injured due to a Russian ballistic missile strike at a training site in the Sumy border region. The Russian Defense Ministry had indicated on Tuesday evening that this site was its target.