4 killed in explosion at business in Russia's Chelyabinsk

Four people were killed and several others injured in an explosion at a business in the city of Kopeysk in Russia's Chelyabinsk region, local authorities said Wednesday, reported Xinhua.

Regional Governor Alexei Teksler said there was no confirmation at this stage that a drone attack was involved.

Earlier, Teksler said that all emergency services had arrived at the scene and a command center had been established.

He added that there was no threat to residents or civilian property in the city.