2 kids shot in bounce house as gunman opens fire on birthday party

A happy day turned into a tragedy on Thursday when two children were shot at a child's birthday party in Georgia.

According to INSIDE EDITION, witnesses to the College Park incident said they heard about 20 to 30 shots before dusk. One person then came across a horrifying sight.

Deanna Titus told reporters that he 3-year-old grandson was shot in the back while inside the bounce house. Another child and a 20-year-old were also shot.

Titus' daughter, the boy's mother, ran into the bounce house following the shots and found her injured son. He was taken by helicopter to a hospital, but his condition is unknown as of Friday morning.

The 20-year-old and a 5-year-old girl are in stable condition.

Police are now searching for those responsible for the shooting.