(CNN) – The death toll from an enormous storm system that plowed through the Midwest and spawned more tornadoes as it moved east climbed late Wednesday to 12, authorities said.

Three deaths Wednesday evening in Tennessee — two in Cumberland County and one in DeKalb County — followed six deaths earlier in Illinois and three in Missouri.

It was not clear whether tornadoes were responsible for the Tennessee deaths. Several homes were damaged or destroyed in Cumberland County, and there were reports of downed trees and power lines, according to county emergency officials.

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