The family of four was injured during a road rage incident on July 4.
Deputies said 18-year-old Bayron Rivera fired a gun at the family because he was upset the family's father cut him off on the road.
COURT DOCUMENTS: Father cut off 18YO man on the road. After exchange of words, teen later pulls an AR 15 and shot rounds into the father’s car. 1 & 2 year old kids inside car were badly burned cause fireworks inside were sparked, lit car on fire. #Abc13 https://t.co/7m8zjkqFYZ pic.twitter.com/bMZnLnuHLK— Stefania Okolie (@StefaniaOnABC13) July 8, 2019
The family tells ABC News their 1-year-old underwent surgery Monday and is recovering.
The father and the 2-year-old, however, are still hospitalized.
They said the burns from the explosion left one of the children unrecognizable.
Deputies said the investigation showed Rivera used an AR-15 style rifle to fire into the family's car.
They said the family and Rivera did not know each other.
Rivera surrendered to deputies Sunday and is now being held on a $120,000 bond.
READ MORE: Suspect who shot into car carrying family of 4 and caused fireworks to go off surrenders, sheriff says
"Our main concern has been to the two children that have been severely injured and face a very long long recovery," said Sheriff Ed Gonzalez in a press conference.
The lead lieutenant on the case said Rivera told them he did not know children were in the car at the time of the shooting.