The JaSaD leader died at a Dhaka hospital on Friday morning, his family said
The victims were identified as Md Asadul, 18, and Korha Mia, 45.
The incident took place while they were working at a building construction site near Islamabag's Ershad Colony around 6:30am Sunday.
They were rushed to the Dhaka Medical College Hospital in a critical condition but doctors declared them dead, the hospital outpost Police Inspector Mozammel Haque said.