Mysterious illness sickens over 22 persons, mostly children in Colorado, USA.

According to , David Friedel, the city’s fire chief, confirmed the news and said that though the cause is still unknown, but all victims were said to have falling ill after entering a pool at a recreation centre on Saturday, March 19,2016.

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The victims reported symptoms such as nausea, dizziness and vomiting.

Friedel said the sickness might have been caused by the Chlorine leak at the pool.

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The Environmental Health Division Manager for Boulder County Public Health, Joe Malinowski stated that no air contaminants was found and tests are ongoing to check if something went wrong with the chlorination system.