Kohl’s has terminated new CEO Ashley Buchanan after an investigation determined that he directed the retailer to engage in vendor transactions that involved undisclosed conflicts of interest.

Kohl’s named Chairman Michael Bender as interim CEO, effective immediately.

The news comes nearly four months after Buchanan, who had been the CEO of arts and crafts chain Michaels, took over the job Jan. 15. Buchanan’s appointment marks the third CEO for Kohl’s in three years as the department store chain struggles to reverse sluggish sales.

Kohl’s said Thursday that Buchanan’s firing is unrelated to its performance, financial reporting, results of operations and did not involve any of its other employees. — Associated Press