The post was shared over 20,000 times.
Banner posted the update with the good news that the baby had been found and reunited with his family. Banner made it clear she was not the mother, and said other family members had been hospitalized after the attack.
The AFP news agency reported that a young woman found the baby and took him home with her. She saw the baby's photo on Facebook, and was able to make contact with the baby's family through the social media network.
Many people are still waiting to hear from their loved ones.
In addition to the Facebook Safety Check, a Twitter account, Nice Find People, has been set up to help with people still searching for their missing family and friends.