A Russian serviceman opened fire on his colleagues and then on local residents in the village of Khmelnitskoye in annexed Sevastopol, according to the city's Moscow-installed governor, Mikhail Razvozhayev.
Four people were killed and four others wounded in the shooting, Mediazona reported, citing sources. Meduza and The Insider confirmed the casualty figures.
The circumstances of the incident and the serviceman's motives have not been disclosed. Details are being clarified.