Authorities say a suspicious package sent to Rush Limbaugh's South Florida home was not dangerous or hazardous.

Instead, police say the item investigated Thursday turned out to be an electronic plaque sent by a listener of the radio talk show host's program as a "business opportunity" for him. It concerned the assassination of President Abraham Lincoln by John Wilkes Booth.

A Palm Beach police spokesman said during a news conference the package was delivered late Thursday afternoon.

When it was screened by an X-ray device, staff members saw what appeared to be wires and called police. The Palm Beach Post reports that a sheriff's office bomb squad went to the home to investigate the package.

The sender apologized when investigators contacted him.