The deceased were identified as Mohon, 22, son of Ismail Hossain and Jibon Miah, 25, son of Shiblu Miah.
Md Mofizur Rahman, officer-in-charge of Pakundia Police Station, said that Mohon and his father came in contact with a live wire, while they were cutting a tree around 10:45am.
When Jibon came to rescue them, he was also electrocuted.
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Being rescued by locals, they were rushed to the upazila health complex where doctors pronounced the duo dead.
The injured Ismail was admitted to Kishoreganj-250 bed hospital.