Authorities in China are struggling to identify 30 people they rescued from illegal brick kilns where they were being enslaved and abused, state-run media reported Wednesday.

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The officials are having a difficult time identifying some of the workers because at least 17 of them are disabled or have a mental illness, police told the state-run China Daily newspaper.

"Some of them can't even speak a whole sentence, and they don't act like normal people," Liu Weiming, deputy director of publicity in Zhumadian, where the workers were rescued, told the state-run paper. "Most are staying at a relief station because they can't remember where they are from."

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