Air defence systems were responding in Khmelnytskyi Oblast on the night of 6-7 December.
Source: Serhii Tiurin, First Deputy Head of Khmelnytskyi Oblast Military Administration, on Facebook
Quote: "Residents of Khmelnytskyi District could hear the sounds of explosions. Air defence systems are responding. Stay in shelters until the all-clear is given."
Background: Ukraine's Air Force reported a threat of Russian drones in the south on the evening of 6 December. UAVs in Khmelnytskyi Oblast moved toward the city of Starokostiantyniv.