Missiles hit two regions in Ukraine on Wednesday killing seven people, local authorities said, while a governor in Russia said a drone strike killed three people in a village close to the border.

In Ukraine's Odesa region, Russian missiles "fired in the evening" killed four people, including a girl of 10, and injured seven more, said Governor Oleg Kiper on the Telegram messaging app.

He added that one of the injured had lost both legs and was in critical condition.

A few hours earlier, two women and a child were killed in the Kharkiv region of Ukraine, the interior ministry said.

Kharkiv region's governor Oleg Synegubov posted photos to Telegram of rescuers clearing up rubble and black smoke billowing from buildings.

The strike hit the village of Lyptsi, some 10 kilometres (six miles) from the Russian border, authorities said.

Ukraine's energy ministry said two facilities in the south had been targeted in strikes during the night, causing power outages in two regions.

Meanwhile in Russia, a Ukrainian drone attack on Wednesday killed three people, including two children, in the Kursk border region, the local governor said.

The Ukrainian drone fired a rocket at a civilian car in a village in Korenevski district, Governor Roman Starovoyt said on Telegram.

"Unfortunately, three people who were in the car at this time were killed, including two children."

The governor also said Ukrainian bombardments had damaged electrical lines in the region, leading to power cuts.

Ukraine has recently targeted Russian border regions on a daily basis in reprisal for Russian bombings of Ukrainian towns for the past two years.

On Tuesday, two people were killed by Ukrainian artillery fire in the Bryansk region, according to local authorities.