FORT WAYNE, Ind. (WOWO): Investigators in Fort Wayne could use your help tracking down whoever’s responsible for 16 unsolved arsons, most of them in the Blackhawk and Blackhawk Forest neighborhoods.

The News-Sentinel reports that the Fort Wayne Fire Department has been investigating some “persons of interest” since April, but so far there are no suspects in mind.

Other than location, the one other thing linking all of the houses targeted has been that they’re vacant.

The fires usually happen between 2am and 4am, behind the houses that get torched, and a couple of homes have been hit more than once.

If you see something suspicious or if you see a fire, call 911. To talk with fire investigators directly, call 311.