Popular taco and burrito chain Chipotle announced Tuesday that it found "unauthorized activity" on a network that supports its payment system. In a statement, the company states that it has has enlisted cyber security firms and law enforcement to help with an investigation.
The hack affected the company’s credit card system from March 24 through April 18, Chipotle CEO Jack Hartung said. The company did not disclose the number of restaurants that were hacked or which customers may have been affected. It did, however, say it "believes actions we have taken have stopped the unauthorized activity..."
A 17.8 percent same-store sales growth in the first quarter of 2017 marked the first time that Chipotle's stock price rose above February 2016, after the chain was plagued with an e coli breakout.
Chipotle says the hacking investigation is ongoing.