Water supply companies in Russia’s republic of Dagestan are facing a criminal investigation after 69 people became infected with Hepatitis A from drinking water.

An online statement posted Thursday by Russia’s health watchdog Rospotrebnadzor said that cases were recorded in three different places in the North Caucasus republic: the towns of Derbent and Dagestanskiye Ogni and the village of Gedzhukh. Fifty-eight of those infected were children.

The victims all complained of feeling generally ill and noticing a yellow tint to the skin, the RGVK Dagestan television channel reported.

Laboratory testing indicated that the local water supply was to blame for the outbreak, according to the statement, noting that all the victims received their drinking water from the same water main.