Shares rose slightly in after hours trading after the burrito chain reported comparable sales rose 17.2% in the first quarter, helped by new menu items like quesadillas and consumers' using federal pandemic relief funds to order tacos and salads online.

Digital sales surged nearly 134% in the first quarter and accounted for half of overall sales, the company said on Wednesday.

The company's digital sales have grown rapidly during the pandemic, encouraging it to expand order-ahead lanes called "Chipotlanes" to a majority of its restaurants in the United States.

Revenue rose 23.4% to $1.74 billion, matching analyst estimates, according to IBES data from Refinitiv.

While the company reiterated that it expects to open about 200 new restaurants in 2021, it continued to shy away from issuing full-year revenue and sales forecasts.

(Reporting by Nivedita Balu in Bengaluru and Hilary Russ in New York; Editing by Arun Koyyur and Bill Berkrot)

By Nivedita Balu and Hilary Russ