The victims are believed to have been shot by an armed prison escapee.
Late on Tuesday night it was not known if the child was related to the gunman. Up to 30 police officers were searching the island for the alleged offender, who police named as Chris Rimamotu (pictured above).
He is believed to have been in jail on abduction charges.
The two victims were said to have been known to Rimamotu.
Sources have told the CI News the weapon was likely to be a .22 calibre firearm.
Police were searching the area around Titikaveka on Tuesday night and, just before 9pm, there were more shots reported in Nikao.
Earlier, a witness got to within 30 metres of the original crime scene and saw a covered body on the ground.
Police were warning the public not to approach the man if they saw him as he was considered very dangerous.
More details in Wednesday's edition of the CI News.
Richard Moore/Rashneel Kumar