Munster centre Damian De Allende says a decision by one of his team-mates to "throw petrol on the fire" resulted in the fire pit accident that left four of the province's players with burn injuries.
The South Africa international was among a quartet of Munster players, along with CJ Stander, RG Snyman and Mike Haley, who are recovering from "superficial burns" after the incident which took place at the weekend.
Munster confirmed that the players all require treatment following the incident and may not be available for Friday's Guinness Pro14 Rainbow Cup clash against Zebre.
Haley and Stander, who sustained burns to their hands, could return to training this week however. Their injuries will be monitored as the week progresses, while De Allende and Snyman will meet a specialist again later this week to review the next steps of their recovery.
Both had been named in South Africa's 46-man squad for two warm-up matches against Georgia ahead of their opening Test against the British & Irish Lions.
Speaking to South African broadcaster Super Sport, De Allende said the fire pit ignited after one of the quartet threw some petrol over the flames, causing an explosion.
"We were just sitting around the fire and one of the boys threw a bit of petrol over the fire and then it caught his hand and he just tried to put it down on the floor and then the whole thing caught alight and exploded," he said, adding that the outcome could have been "a lot worse".
The 29-year-old suggested that they should all recover "in a few weeks".
He said: "That's what we’ve been saying, they thought it was a lot worse when we went into hospital on Saturday night but when we saw the specialist on Sunday he said it wasn’t as bad as they got told. We should be okay in a few weeks hopefully."