NPC International Inc., the largest franchisee of Pizza Hut restaurants in the U.S., filed for bankruptcy after coronavirus-related shutdowns added to competitive pressures in the restaurant industry.

The closely held company sought Chapter 11 protection in the Southern District of Texas court on Wednesday. NPC, founded in 1962, operates 1,227 Pizza Hut and 393 Wendy’s stores across the U.S., according to court papers.

NPC and Pizza Hut have struggled with rising labor and food costs while trying to expand delivery and move away from traditional dine-in restaurants. The Overland Park, Kansas-based company also faces cut-throat competition from rivals such as Domino’s Pizza Inc. and Papa John’s International Inc.