The Mapco Express convenience store chain experienced a breach of customer credit/debit card information after malware was planted in payment processing systems. Customers who used credit/debit cards at Mapco Express stores during
certain periods in March and April may be affected.
Source:
http://news.softpedia.com/news/US-Convenience-Store-Chain-Mapco-Express-Hacked-Payment-Cards-Compromised-351249.shtml