LAWRENCE (AP) – Lawrence fire investigators are investigating 15 recent fires that are suspected to be arson.

An early morning fire at an apartment building in Lawrence on Friday is being linked to the string of suspected arsons that now total 15.

The Kansas City Star reports that the small fire Friday was reported in a stairwell and was quickly extinguished. There were no injuries.

Officials believe it’s related to a strong of Lawrence arsons that began October 19th. The Bureau of Alcohol, Tobacco, Firearms and Explosives is offering a reward of $5,000 for information leading to an arrest and conviction.