LOGAN, W.Va. -- Authorities are investigating a series of suspicious fires that have damaged several buildings in Logan.

Media outlets report that two fires in the last week have been ruled as arsons. One occurred at the Knowles Animal Hospital and another occurred at a vacant building.

Logan Fire Chief Scott Beckett says fires at two commercial structures within seven days is more than coincidence.

Beckett says eight or nine fires have occurred in the last six weeks.

Jason Baltic with the State Fire Marshal's Office says evidence linking the fires hasn't been found yet.