AN explosion was heard by witnesses of a clothing store fire in Nadi that killed a 37-year-old carpenter and left its owner in critical condition at the Lautoka Hospital.
National Fire Authority chief executive officer John O'Connor revealed the information as the authority continued to investigate the cause of the fire on Monday morning.
The blaze destroyed His and Hers clothing store on Nadi's main street.
Mr O'Connor said witnesses revealed the two might have been doing some tiling work before the fire started. He said one possible cause of the fire was an electrical fault from one of the machines used by the men while they were renovating the store.
"But that is something that we are still trying to determine with our investigations," Mr O'Connor added.
He said the main witness was the store owner who suffered 75 per cent burns.
"The last update we got from the hospital was that he has been airlifted overseas for further treatment.
"We will wait for him to recover before we question him," Mr O'Connor said.