Denny’s Restaurant at 16686 Bernardo Center Drive in Rancho Bernardo was robbed just before 3:30 a.m. Friday, according to San Diego police.

According to reports, three masked men armed with handguns entered the restaurant, locked two employees in an office, took money from the register, and fled the scene on foot.

10News.com reported that the two employees were assaulted in the robbery.

The suspects were described as black men in their 20s.