Cosi has closed its Woodmont Avenue restaurant in Bethesda.

The sandwich shop this week announced the closure on a sign posted on a window fronting the store. “We truly appreciate your patronage and we apologize for any inconvenience,” the sign says.

The Boston-based fast-casual chain filed for Chapter 11 bankruptcy Wednesday and plans to sell itself to lenders, according to The Wall Street Journal. The report noted the business has closed 29 stores since Monday and laid off more than 450 workers at it struggles to pay off nearly $20 million in debt. Over the past year the publicly traded company’s stock price has dropped from a little over $1 to 7 cents as of Thursday.

Cosi on Bethesda Row. Credit: Andrew Metcalf

The chain, which is known for its flatbread sandwiches and salads, fired its CEO in August after years of declining sales.

Local blogger Robert Dyer first reported the restaurant’s closure. The closure leaves another vacancy along the Woodmont Avenue stretch of Bethesda Row. Max Brenner Chocolate Bar, two doors away from Cosi, closed in June.