Two more injured, who were admitted to Raichur Institute of Medical Sciences (RIMS) in Raichur after they were set on fire on Wednesday, also died of burns on Thursday morning.
The police gave the names of the dead as 62-year-old Siddaramappa and 38-year-old Muthappa.
Two men, 35-year-old Nagappa and 65-year-old Sharanappa Sarur, who were among the four who were set on fire, died on Wednesday.