Ukrainian forces have carried out an attack against the Russian Black Sea Fleet headquarters in Sevastopol early on Sunday, Sevastopol Governor Mikhail Razvozhayev announced in a social media post.
According to Razvozhayev, the attack was carried out via an unidentified object - presumably a UAV - that flew into the courtyard of the headquarters.
Although no one was killed during the attack, six members of staff at the headquarters were injured, according to the city's governor.
The governor also declared that all Navy Day festivities in the city have been cancelled because of security concerns and urged people to stay home wherever possible while the Russian Federal Security Service (FSB) investigates the attack.
Meanwhile, the Black Sea Fleet press service announced that the attack was carried out via a low-yield explosive device strapped to a UAV, and that the five people who got injured during the attack were actually hit by glass fragments when a window in the room they were in shattered during the blast.
The last Sunday of July is observed annually in Russia as Navy Day, and Razvozhayev suggested that "Ukrainian Nazis" launched this attack to ruin the holiday for the Russian people.