Investigators with the Florence County Sheriff's Office were called to the scene of a possible meth lab at an apartment complex on Willow Drive in Florence.
Deputies evacuated some apartments about 7 p.m. Those residents are expected to be allowed back into their homes within a couple of hours.
Fire crews and EMS were called to the scene as well.
The Florence County Emergency Response team responded to handle hazardous materials.
Fire officials say the chemicals found on scene are the type associated with meth labs.
Officials say three people were taken into custody, but there's no word on whether they face any charges.