Nattaya Rorsungnoen was pronounced dead at Rayong Hospital where she had been on a respirator under close observation.
She is the second five-year-old girl to die as a result of the attack on a People's Democratic Reform Committee (PDRC) protest in the area. Laliwan Promma succumbed to a gunshot wound to the head in the deadly attack.
Nattaya was shot in the back of the neck. A fragment of the bullet was embedded in her right temple, causing her brain to swell and stop functioning.
Nattaya’s family will collect her body from the hospital at 10am Wednesday and perform religious rites for her in Trat later in the day.
Nattaya and Laliwan were not the only child victims of protest-related violence over the weekend. Two children were killed after a grenade explosion near Big C Superstore at Ratchaprasong on Sunday - a six year-old girl, and her four-year old brother.
The deaths of the innocent children have drawn widespread condemnation from the public and anti-government protesters, who are calling for police to quickly bring those responsible for the attacks to justice.