The robbery was reported at about 12:04 a.m. at Lingerie Etc. at 2298 Monument Blvd.
According to police, a store employee had just closed the store for the night when he was approached in the parking lot by two male suspects wearing hooded sweatshirts.
The suspects ordered the employee to reopen the store and then they locked him in a storage closet while they stole merchandise and money from the store, police said.
The employee was not injured in the robbery, police reported.
Anyone with information about the robbery is encouraged to contact the investigations division of the Police Department at (925) 288-4630.