Two people were killed when a tanker carrying Liquefied Petroleum Gas (LPG) exploded after hitting a road divider and turning turtle here late Monday night.
A woman died in the morning Tuesday. Later in the evening, a resident of the area near the accident site, Abdul Azeez, succumbed to burn injuries in hospital.
The condition of six others was reported to be serious. At least 27 people suffered burns in the incident.
Seven houses and 15 shops near the site of the accident went up in flames.
Kerala Chief Minister Oommen Chandy rushed here from the state capital and visited the injured. He ordered the district authorities to see that the divider which caused the accident is removed immediately.
"The government will pay Rs.10 lakh as compensation to the kin of each of the dead, and those injured will get up to Rs.five lakh. A sum of Rs.10,000 to all the injured would be disbursed today (Tuesday)," said Chandy to reporters here.
"Had there been no heavy rain at the time, the toll might have been higher," a witness said.