The Ukrainian Air Force reported this.
In addition, the Russian army fired 6 S-300 missiles from the temporarily occupied Kherson region in the direction of Mykolaiv and Kherson regions.
"The Russian enemy began attacking with Shahed-136/131 strike UAVs at 7:00 p.m. on December 13. The launches were carried out in waves from three directions: Balaklava, Chauda - Crimea and Primorsko-Akhtarsk - Russia. In total, 42 attack UAVs were launched," the statement says.
The main direction of the strike was the Odesa region, where the vast majority of UAVs were shot down.