Three men are nursing burns about the body following an argument in Arima on Saturday night.
Two men are said to be warded in serious condition, while a third is critical.
Two of the victims are said to be ages 46 and 26 and both reside in Arima.
According to reports, two men were at a home along Jean Lane in Arima around 7 pm, when one of the men got into an argument with an older male relative.
The verbal exchange soon became physical, and one of the men, said to be the 23-year-old suspect, walked away.
He reportedly returned a short while later with a bucket containing a liquid substance that was suspected to be gasoline.
The suspect threw the contents of the bucket on the 46-year-old man, which also splashed onto the 26-year old man who was also present and who tried to intervene.
Some of the liquid also splashed on the 23-year-old suspect.
The liquid ignited and all three individuals suffered burns about their bodies.
Persons in the area who heard the commotion and screams of pain ran to the aid of the three men and attempted to put out the flames.
The police and emergency health services then were notified.
All three men were taken to the Arima Hospital.
Officials said the 46-year-old suffered burns to 80 per cent of his body; the 26-year-old suffered burns to both legs and his right arm; while the 23-year-old suspect suffered burns on both legs and both arms.