The deceased were identified as Mizanur Rahman (35), an engineer from Kushtia district, Azizul, manager of the construction site from Dinajpur district, and Nuru (45), a construction worker from Maharajpur village in Chapainawabganj district.
According to witness, when the victims were working on the sixth-floor balcony of the eight storeyed building it suddenly collapsed around 11:30, leaving them dead on the spot.
Locals rushed them to Jashore general hospital where doctors declared them dead, reports UNB.
Kotwali Police Station Sub-Inspector Zahid said investigation is underway and legal action will be taken.
The bodies were kept at the Jashore general hospital morgue for post-mortem, he added.