Eyewitnesses told ABC11 that teenagers were the ones shooting. However, police say they don't even have a description of the suspects.
Now, parents at Forest Hills Park say they can't help feeling on edge.
"Usually on a hot day, you have 25, 50 people here," said concerned resident Jefferson Harmon.
Instead, the park was almost empty Thursday. In its parking lot sits a reminder why -- one of several cars hit by bullets still sits there.
Beverly Mewborn is a grandmother who was enjoying the park before the shooting broke out. She's listed on the police report as one of the people whose car was hit.
"There were some kids from southern and Jordan High," said Mewborn. "They were having a cookout, then all of sudden a fight broke out and the guys just busted out with guns and started shooting everybody."
Mewborn said those guys were teenagers.
She said parents and children ran for cover. It's something these families say could have been them had they come to the park just one day earlier.
"It could have been my nephew or it could have been myself," said Harmon.
"It's a little bit scary. We come here as often as we can," said parent Abiola Yearwood.
For now, Durham police say they'll increase patrol around the park until they find the suspects behind the gunfire to keep people safe while they enjoy the family-friendly area.
Police say they are working with Durham Parks and Recreation to find out if the park shelter was rented at the time. It could help lead them to possible suspects.
If you have any information about what happened, you're asked to call Durham police at (919) 560-4583 ext. 29359.