Woonsocket, Rhode Island (CNN) -- A package left outside a mailbox apparently because it wouldn't fit in the box caused a security scare Monday near the location of a scheduled appearance by President Barack Obama in Woonsocket, Rhode Island, state police and the Secret Service said.
The FedEx package was destroyed by a bomb squad, Rhode Island State Police Capt. Darren Delaney said.
The package was apparently too large to fit through the mail chute and was left by the sender, U.S. Secret Service spokesman Edwin Donovan said.
There was no evidence to suggest the package contained harmful materials, and no link has been established between it and Obama's visit, except by proximity, Delaney said.
Police closed down the road near where the package was found, and White House reporters heard a pop about five minutes later. The package was described as a cardboard box that was 1 foot by 1 foot, left under a mailbox.
Obama is scheduled to speak later Monday on a campaign swing through the state.
CNN's Sally Holland contributed to this report.