An E. coli O157:H7 outbreak linked to BBQ Shack in Toccoa Georgia sickened as many as 18 people, health officials announced Friday.

Several of the victims were hospitalized as a result of their infections, and five developed hemolytic uremic syndrome (HUS), a complication of E. coli infection that leads to kidney failure.

The outbreak appears to be over, and to have lasted only a short time, according to health officials. Patients fell ill between May 4 and May 8, 2013. No cases with onset dates after May 8 have been reported.

Among the potential vehicles of the bacteria identified by investigators is iced tea served at the restaurant.