PLEASANTON (CBS SF) — Police in Pleasanton on Tuesday afternoon investigated shots fired in a parking lot at the Stoneridge Shopping Center.

The department tweeted just before 3 p.m. that there was police activity near the shopping center located at 1000 Stoneridge Mall Road.

READ MORE: Mothers Tearfully Remember Children Slain In Bay Area Homicides

Police later clarified that they received reports of shots fired in the area at around 2:21 p.m.

Arriving officers went to the shopping center’s second-story “E” parking lot where they located two vehicles with bullet holes along with several shell casings.

A short time later, officers received information that a subject entered the mall before fleeing through another exit. Officers conducted a search of the shopping center and the surrounding area, but were unable to locate any involved subjects.

Police cordoned off an area of a second story parking lot at the mall during the investigation, according to KPIX reporter Juliette Goodrich, who was at the scene.

READ MORE: One Dead In Early Morning Cupertino House Fire

Officers cleared the parking lot area while searching for a suspect. No injuries were reported.

Pleasanton police officers were still at the scene as of early Tuesday evening and the investigation is ongoing. Stoneridge Shopping Center remained open for business.

MORE NEWS: Video: Motorist Rescued From Fiery Freeway Crash In San Jose

Anyone who witnessed the incident or may have additional information regarding the case is asked to call the Pleasanton Police Department at (925) 931-5100.