He said that Chipotle had implemented additional security measures and were working with a cybersecurity firm, law enforcement and the payment processor to address the matter.
The transactions took place between March 24 and April 18.
Officials said because their investigation is ongoing, complete findings are not available and it is too early to provide further details on the investigation. Hartung did promise that the company will notify customers who may have been affected by the breach once it learns more about specific restaurants that may have been affected and the exact timeframe for each.
Chipotle emphasized that customers should "closely monitor" their bank statements for any unauthorized charges.
'Unbreakable'-'Split' sequel announced by M. Night Shyamalan
Willis also made a surprise cameo during the twist ending of Split , suddenly linking two films that initially appeared unrelated. The news came on the same day Ridley Scott revealed he has a script to bring Russell Crowe' s Gladiator hero back to lfe.
Luis Severino and Aaron Judge make statement to Red Sox
We're guessing the 6-foot-7 phenom will have a hard time forgetting his 25th birthday - and his first time playing at Fenway. First, he hit a two-run opposite field bomb, his seventh of the season, to give the Yanks a 2-0 lead in the second.
USA wants to bring North Korea 'to path of dialogue'
According to the US Navy's Submarine Force Pacific website, the USS Michigan carries more than 150 Tomahawk cruise missiles. President Donald Trump called all 100 senators to the White House for a briefing Wednesday on North Korea.
Hamas in Gaza says it won't be cowed by Abbas' threats
Gaza's sole power plant ceased activity after it used up all the Turkish and Qatari fuel which it had been provided with. Israel now provides Gaza with 125MW, which accounts for 55% of the territory's usual electricity supply.
Arkansas executions: 'It was very methodical'
Minutes before his execution, a brief stay was granted so attorneys could argue the first execution did not go as planned. The internal affairs log says Williams, who weighed 400 pounds, was restrained in the death chamber at 9:30 p.m.
Trump tweets don't help: 1st Twitter revenue drop since IPO
Shares of Twitter skyrocketed in premarket trading, soaring by as much as 11% to $16.27 after this morning's earnings release. Noto said Twitter wants to air live video to users 24 hours a day, seven days a week via its desktop and app offerings.