More than 100 people have suffered gastrointestinal symptoms as E. coli was found in drinking water in Aanekoski, a small city in central Finland, due to a pipe fracture, Finnish new agency STT reported on Thursday.

Residents in Aanekoski and surrounding areas were advised to boil the water that they need for preparing food. About 800 households were involved.

Sinikka Rissanen, health inspector from the Environmental Health Service of Aanekoski, estimated on Thursday that at least 100 residents have suffered gastrointestinal symptoms caused by the polluted tap water so far.