The Roswell Fire Department is investigating a warehouse fire that happened over the weekend. RFD said just after 1:30 a.m. Sunday, they responded to a commercial fire on Hembree Park Drive. When they arrived at the scene, they found burning pallets. RFD said the burning pallets were endangering a large warehouse. There was a separate trash fire in the wood line adjacent to the structure that crews had to battle. The fires were extinguished and no injuries were reported. The cause of the fire is still under investigation.