A scene like something out of a horror movie shocked residents of the small Slovakian town Myjava on a calm Sunday morning. Concerned residents notified police Sunday when their river turned blood red.
Firemen, state and town police, a technician from the water authority, a fishing association chairman, and other local authorities all gathered to see what was going on, reported local media.
Investigators found the source of the coloring at a sewage grate, according to Slovak newspaper SME.
A 43-year-old employee at a local company was cleaning nine plastic containers from a printer unit used for printing food packages, said city spokesman Marek Hrin on Facebook.
The employee had taken the containers from his work for further use at home. The coloured water poured into the sewer in the courtyard near his house, which flows straight into the local river.
Fortunately, no fish or other wildlife should be impacted; since the dyes are used for food packaging, they are non-toxic. Authorities are nonetheless analysing the substance.
Slovak police are investigating the act as a violation of environmental regulations, and the man was fired from his job.