NEW YORK - Sears is closing an additional 72 stores this year, according to the retailer.  None are in Oklahoma.

The closures are part of the chain's strategy to focus on its best-performing stores as it tries to stem years of losses. 

Its revenue plummeted more than 30 percent, Sears said, in a quarter the CEO admitted was "challenging." 

The beleaguered department store chain has closed more than 100 stores in the first three months of the year, according to SEC documents.