MOSCOW, November 9 (RIA Novosti) - A husband and wife and their four adopted children have died in a fire in a residential building in west Russia's Belgorod Region, a police source said on Monday.

"The blaze occurred in a one-storey wooden house on Sunday evening in the village of Kalinovo in the Krasnogvardeysky District," the source said. "The owners of the house and their four adopted children died."

He also said that the couple had four other children who were with relatives at the time of the blaze.

The cause of the fire is being determined.

According to Russia's emergency services, 15,165 people died in fires across the country in 2008, including 584 children. On average, 42 people die daily in Russia in fires.

In the U.S., with a population over twice as large, the figure is around 3,400 deaths a year.