The Ukrainian Air Force reported several groups of attack UAVs in Kherson Oblast heading for Mykolaiv Oblast on the evening of 16 November.
Source: Air Force on Telegram
Details: An air-raid warning has been issued in Kherson and Mykolaiv Oblasts. Also, a threat of ballistic missile use was reported in Kharkiv, Donetsk and Dnipropetrovsk Oblasts.
Update: The threat of ballistic missile use was lifted at 23:44.
The Air Force reported after midnight on 17 November that groups of attack UAVs were on the border of Mykolaiv and Odesa oblasts.
Later, they noted that the attack drones were in Odesa Oblast's north and that they were moving toward the northwest.
At around 01:30, an air-raid warning was issued in Kirovohrad and Vinnytsia oblasts and the all-clear was given in Kherson, Mykolaiv and Odesa oblasts.
Quote from the Air Force: "Drones are on the border of Odesa and Vinnytsia oblasts. They are moving toward the northwest."
Details: At 01:48 the all-clear was given in Kirovohrad Oblast.
After 02:00, an air-raid warning was issued in Dnipropetrovsk, Zaporizhzhia, Khmelnytskyi, and Sumy oblasts.