LINCOLN, Neb. (AP) — A spokesman for Pfizer says the pharmaceutical manufacturer has no records showing that it sold any potential lethal injection drugs to Nebraska's corrections department.

Pfizer spokesman Steven Danehy made the comments Monday to the Lincoln Journal Star after state Sen. Ernie Chambers challenged the company to sue the state in hopes of blocking the scheduled Aug. 14 execution of inmate Carey Dean Moore.

Pfizer has asked Nebraska's corrections department to return any "restricted products" that could be used in an execution and renewed its request just in case the state has obtained them.

Corrections officials have repeatedly refused to release records that might identify its supplier.

Another drug company, Alvogen, filed a legal objection in Nevada this month to keep one of its drugs from being used in an execution.

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Information from: Lincoln Journal Star, http://www.journalstar.com