Two workers died after inhaling toxic gas inside a water tank in Harbatali area in Chattogram city yesterday morning.
The deceased are Md Raju (30) and Md Raihan (28) , said police.
Mostafizur Rahman, officer-in-charge of Akbar Shah Police Station, said the two fell sick when they descended into an underground water tank for cleaning at a new building in the area around 8:45am and died on the spot.
As the building owner did not get any response from the workers for a long time, he informed police and fire service, the OC said.
Later, firefighters recovered the bodies from the tank, he said, adding that the bodies were sent to Chattogram Medical College Hospital.