According to the weather department, winds blowing at the speed of 60km per hour, accompanied by lightning and showers, swept across the state between 1am and 2am.
The State Disaster Management Department could not ascertain the number of people who sustained injuries in the storm, but pegged the toll at four.
Amrit, who also holds the charge for power department, said electricity supply was disrupted in various parts of the state, especially in north Bihar, as the storm uprooted hundreds of trees, resulting in snapping of cables and collapse of poles.
"We have, however, restored power supply in all affected areas later in the day," he said.
The CM also issued instructions for "expeditious payment of ex-gratia to the next of the kin of the deceased", an official release said.
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