Reports indicate that the incident happened while the men were working on the chiller on the roof of the 15-storey Six Seasons Hotel in the up-market Dhaka neighbourhood of Gulshan.
The two injured men, said to be suffering from severe burns, were reported to have been rushed to the burns and plastic surgery unit of Dhaka Medical College Hospital. According to the Dhaka Tribune, one victim was said to be suffering from 62% burns, the other 45% burns.
The Daily Star of Bangladesh has reported that the police have detained five hotel staff in connection with the blast which blew metal fragments through the windows of nearby houses, one owned by a former government minister, hitting a security guard in the hand.
The hotel is said to be relatively new, having only been open for about a year. No details regarding the cause of the blast have yet been revealed.