(Reuters) -- Prosecutors charged a computer programmer with stealing software code valued at nearly $10 million from the Federal Reserve Bank of New York.

They charged Bo Zhang, who worked as a programmer at the bank, with illegally copying software to an external hard drive, according to a criminal complaint filed in District court on Wednesday.

It was not immediately clear if Zhang was in custody, but court documents said he had admitted to taking the code. Authorities said the software, owned by the Treasury Department, cost about $9.5 million to develop.

(Reporting By Basil Katz; Editing by Gary Hill)