Target says registers in its stores are back up and running today following some major checkout troubles across the country, including on Long Island.

The retailer suffered a technical glitch Saturday afternoon. It brought sales to a stop at stores nationwide.

The outage kept cashiers from scanning merchandise and processing transactions. Self-checkout registers also weren't working at times, causing massive lines in some stores.

It led to lost revenue and long lines over the Father's Day weekend.

Some stores temporarily closed because of the issue.

Target says registers were back online by about 6 p.m. Saturday. The store says it was not a data breach and no customer information was compromised.

 Associated Press wire services contributed to this report.