Pizza Hut plans to close 250 U.S. restaurants in the first half of this year as its parent company considers a sale of the chain.

Yum Brands said Wednesday it’s targeting underperforming Pizza Hut restaurants in its system. Pizza Hut has more than 6,000 locations in the U.S.

Louisville, Kentucky-based Yum Brands said in November it was conducting a formal review of options for Pizza Hut, which has struggled with outdated stores and growing competition. The chain’s U.S. same-store sales, or sales at locations open at least a year, fell 5% last year, Yum said.