The injured have been shifted to the emergency ward of SN Medical College, they said, adding that two of the injured were in critical condition.
"The deceased includes two women and four men," a police official said.
Eye witnesses told the police that the driver of overloaded truck lost balance due to dense fog and then fell over two cars.
"One car was overtaking the overloaded truck while another rammed it from the back. A large number of villagers gathered and managed to extricate the bodies," a bystander told the police.
A case has been registered and police is investigating the matter for further details, the official added.
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