Moscow regional governor Andrei Vorobyov said a Ukrainian drone attack on an industrial facility near Moscow killed at least five people and wounded ten.
Vorobyov said the strike hit the Novoselki area of Chekhov district, about 69 km south of the capital, and set a warehouse on fire; seven of the wounded were in moderate condition and one was in serious condition.
Ukrainian media identified the site as linked to Wildberries, the large e-commerce company sometimes called "Russia's Amazon".
Local officials said overnight strikes also targeted Wildberries warehouse sites in the St Petersburg and Tver regions; the company confirmed the St Petersburg attack but made no other public comment.
Kyiv, which has repeatedly struck Wildberries warehouses in recent weeks, says the facilities are used for Russian military logistics; Moscow denies the accusation.
Russian retaliatory strikes on several areas of Ukraine killed at least four people and wounded several.
Ukraine's State Emergency Service said an 89-year-old woman was killed in the southern port city of Mykolaiv and seven people were wounded, including two children aged two and twelve.
Both Russia and Ukraine say they do not deliberately target civilians.