AT&T Inc. said on Tuesday that computer hackers illegally accessed credit card data and other personal information from several thousand customers who bought DSL equipment from AT&T’s online store. The phone company said it is notifying “fewer than 19,000″ customers whose data was accessed over the past weekend.

The company said it noticed the hacking “within hours,” immediately shut down the online store, notified credit card companies and is working with law enforcement agencies to investigate the incident and find the hackers.

It said it would also pay for credit monitoring services to assist in protecting the customers involved.

A spokesman was not immediately available to provide additional details.