According to a Russian official in Crimea on Saturday, Russian Black Sea warships successfully repulsed a drone attack on Sevastopol Bay.
Russian lawmaker and Sevastopol mayor Mikhail Razvozhayev claimed on social media that "no city infrastructures were affected."
"Everything is peaceful and in order. All operational teams are available, the leader declared.
Ferries and boats cannot currently enter the harbour, according to the Russian state news agency TASS.
CNN is unable to independently verify or validate Razvozhayev's assertion. Additionally, Ukraine's side has not acknowledged the occurrence.
Sevastopol and the rest of Crimea are acknowledged globally as belonging to Ukraine. It has served as both an important harbour and the largest city on the peninsula.
Volodymyr Zelensky, the president of Ukraine, has vowed to "liberate" the entire nation's territory, including Crimea, which has been occupied by Russia since 2014.
The journalist was killed in a shooting accident at a military training camp in Crimea on Friday, according to Russian officials and state media, and he worked for a prominent Kremlin-backed media organisation.
In the meantime, a Ukrainian official asserted on Friday that his nation's forces are almost ready to seize control of a strategic road connecting the vital towns of Svatove and Kreminna in the Luhansk area.
The Luhansk regional military administration's chief, Serhiy Hayday, wrote late Friday on social media that the route was "practically under Ukrainian control."
For Ukrainians, the towns are important objectives.
The towns are important objectives for the Ukrainian Armed Forces as they advance eastward into Luhansk, which is largely occupied by Russia.
Although CNN is unable to independently verify the assertion, retaining the route would prevent Russia from reaching Luhansk from the north.
Hayday said in a new article on Saturday morning that Ukraine had attacked Russian fortifications and air defence systems with airstrikes.
According to Hayday, enemy sites containing self-propelled artillery system batteries and other significant military targets were targeted by missile and artillery forces.
This story is still developing. More will follow.