Two more children from the same Palm Beach County community have been diagnosed with brain tumors.

The news comes as the Florida Department of Health investigates a possible brain cancer cluster in the area. Thirteen children were diagnosed with brain tumors or brain cancer from 1995 to 2008. Parents have expressed concern that environmental hazards, including well water, could have caused the diseases.

The state Department of Environmental Protection randomly sampled 50 private wells in The Acreage in August and September, but concluded there were no signs of man-made contamination exceeding state limits.

Still, health officials have surveyed properties and asked questions to residents related to international travel, immunizations and other factors.

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Information from: The Palm Beach Post, http://www.pbpost.com