All the labourers were from Nepal and not part of the designated fire fighting teams, a forest official in Almora said.
They received burn injuries while struggling to quell the blaze in Gananath range of Almora forest division near their factory on Thursday and were under treatment at the base hospital, Almora, the official said.
According to the data, 64 new incidents of forest fire were reported from different parts of the state over the last 24 hours in which 74.67 hectares of forest land were destroyed.
Since November 1 last year, there have been 868 fire incidents in Uttarakhand in which more than 1,000 hectares of forest land have been gutted.
Of the total fire incidents, Kumaon has reported 456 and Garhwal 344, the forest fire bulletin said.