It all unfolded around 3 a.m. at the WinCo Foods on Rio Rancho Road, according to the Pomona Police Department.
Employees and customers ran out of the 24-hour store after reports of shots fired, but no injuries were reported.
AIR7 was over the scene where several police units surrounded the store. Officers even sent in a robot dog to help in the search, but a suspect was not located.
Employees were eventually let back several hours later.