The labourers were working in an irrigation project at Jhadabeda when suddenly a mound of earth which which was formed after digging of mud from a canal suddenly caved in and fell on them, the police said.
The deceased, whose bodies were retrieved from under the heap of mud, were identified as Miru Hansda (38) and Champa Ho (35), Karanjia Police station, Inspector-in-Charge (IIC) Laxmidhar Swain said.
Two others, one woman and a man, have been rushed to a government hospital at Karanjia, Swain said.