All Colorado locations of Del Taco, a popular fast food restaurant that serves Mexican food, were abruptly closed Thursday, except for one. The company said in an emailed statement to USA TODAY on Friday that Del Taco franchise locations in Denver and Colorado Springs "are temporarily closed.

Del Taco abruptly closed all but one of its Colorado restaurants on Thursday with no explanation, according to signs posted on doors and a statement from the company.

Del Taco abruptly closed 18 of its 19 restaurants in Colorado on Thursday. Signs on the door thanked customers for their patronage.

All but one Del Taco location in Colorado closed abruptly Thursday, though the company said it is working to reopen them “as soon as possible.”

Del Taco closes all Colorado locations abruptly, surprising customers and employees without clear explanation.

Signs were posted on the doors alerting customers that, effective Thursday, “Colorado Del Taco locations are closed until further notice.” Signs were also posted in the drive-through.

The franchisee of the Mexican fast-food chain’s 18 locations in Denver and Colorado Springs closed locations following a bankruptcy and a

Franchisee Newport Ventures, which declared bankruptcy in October, shuttered all of its locations after a lender refused further funding.

The Grand Junction location will remain open because it’s operated by a different franchise. But the other 18 Del Tacos in the state closed abruptly Thursday. The chain hasn’t commented on what prompted the closure.

For all the debate over the restaurant relief bill (up for discussion at the Colorado Legislature on March 3), the hottest topic on the Denver dining scene this week was the abrupt closing of all but one of the nineteen Del Taco locations in the state.