A Missouri senator says a subpoena has been issued to a federal investigator who sought a list of Missouri concealed gun permit holders.

Senate Appropriations Committee Chairman Kurt Schaefer said the Senate issued a subpoena Friday to Special Agent Keith Schilb of the Office of Inspector General in the federal Social Security Administration.

Schaefer scheduled a committee meeting next Wednesday to hear from Schilb.

An official at the Social Security Administration did not immediately respond Friday to a question from The Association Press about whether Schilb had received the subpoena and planned to testify.

Republican lawmakers have raised concerns that a list of concealed gun permit holders was twice provided to Social Security fraud investigators. The agency says a computer disk never was read and was destroyed.