Target Corp. said Monday that the "glitch" that led to delays at its registers on Sunday night was related to a defect with a network device that impacted the speed of its point-of-sale systems.

The Minneapolis-based retailer did not offer any more details about the issue, noting that it had been resolved later Sunday night. But the company reiterated that there was no evidence the problem was related to a cybersecurity issue.

Online transactions through its website did not appear to be affected.

Customers around the country took to social media Sunday night to report long check-out lines due to ­registers not working.

"Earlier this evening, Target experienced a glitch that impacted the speed of checkout at some of our U.S. stores. Since that time, we've been able to restore our check-out process. Once again, we sincerely apologize to anyone inconvenienced by this issue," Molly Snyder, a company spokeswoman, said in an e-mail.

The glitch comes at an inopportune time for the retailer, which is still trying to regain customers' trust following the crippling data breach late last year in which millions of customers' information was ­stolen by cyberthieves.

Since then, the Minneapolis-based retailer has been stepping up promotions to draw shoppers back to its stores throughout the country.

On Sunday night, Target employees tried to placate shoppers irritated by the long lines by handing out $3 coupons in some stores that said "We are sorry for any delay you experienced in our store."

At the Target store on Nicollet Mall, a security guard warned shoppers as they entered the store that some of the registers were down so there may be a wait to check out. Employees also handed out free cookies and bottled water along with the coupons to customers as they waited.

On Twitter, some customers also reported receiving free Starbucks items and popcorn.

Jeff Wheeler contributed to this report. Kavita Kumar • 612-673-4113