ATCHISON, Kan. (AP) — Authorities say some type of incendiary device damaged eight businesses in downtown Atchison.

Fire Chief Ted Graf says no one was injured the incident early Friday.

The St. Joseph News-Press reports investigators responding to an alarm found structural damage and broken windows throughout the downtown business block.

Graf says the scene eventually was determined to be safe enough to allow business owners into their damaged stores. He says some stores might reopen Friday afternoon.

An investigation involving federal, state and local offices is continuing.

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Information from: St. Joseph News-Press/St. Joe, Missouri, http://www.newspressnow.com