CAMERON, Mo. — A state investigation into a high number of brain tumors among area residents finds high levels of arsenic and lead near a shuttered fiber insulation plant.

The results from soil and water tests at the long-closed Rockwool Industries fiber insulation plant are still preliminary, a Department of Natural Resources official cautions.

More details are expected to be released Monday, three days before a town meeting to discuss the state's findings.

Some Cameron citizens have said that at least 11 area residents developed brain tumors since 2002. At a community meeting last month, officials from the state's cancer registry said that they have received unverified reports of 20 to 40 other cases.