Officials say at least 20 children at a South Florida preschool have been hospitalized after suffering from nausea and vomiting.

Lauderhill police and fire spokesmen tell the Sun Sentinel (https://goo.gl/2AkeCD) that children from Ave Marie Friends Preparatory School shared gurneys Monday afternoon as paramedics loaded them onto ambulances for trips to three nearby hospitals.

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The cause of the illness wasn't immediately known. Lauderhill Police Lt. Gregory Solowsky says a hazmat team will investigate.

The conditions of the children were unknown. No deaths were immediately reported.