PICO RIVERA >> A day after bullets ripped through a Chuck E. Cheese’s restaurant window, sheriff’s detectives were examining whether a shooting outside the business between two men was gang-related.

“We are leaning in that direction, and our gang unit detectives are conducting the investigation,” Capt. Allen Castellano said Monday.

The direction of the case, he added, is due to the information deputies gathered from witness accounts inside and around the pizza parlor, as well has what is on the surveillance tape.

Sgt. Raymond Cardenas of the sheriff’s Pico Rivera station estimated there were over 50 people inside the restaurant at 6005 Rosemead Blvd. when the two men apparently got into an argument in front of the location at around 8 p.m. Sunday. Shortly thereafter, shots rang out. No one inside the restaurant was injured, he added.

“As far as we know at this point, no one inside was targeted by either suspects,” Castellano said.

The front windows of the restaurant were shattered by gunfire from the two handguns the pair used.

Deputies said at least four rounds hit the restaurant, which Castellano called “errant rounds.”

A couple of cars in the parking lot were also hit.

“At least 13 rounds were fired,” said Lt. Andrew Meyer

It was unclear if either of the men were wounded, he said, since no shooting victims were found in the area or at local emergency rooms.

“This incident could have turned deadly, with innocent victims inside the restaurant being hit,” Castellano said

Officials described the suspects as Latinos, between 18 and 30 years of age, 5 feet 9 inches tall and about 180 pounds, Cardenas said.

One suspect left in a dark-colored car while the other suspect fled in a dark-colored pick-up truck.

Anyone with information is asked to call the sheriff’s Pico Rivera Station at 562-949-2421.

Tips may also be submitted anonymously via L.A. Regional Crime Stoppers at 800-222-8477.

“Somebody has to know who these individuals are, and we would like them to contact us,” Castellano said.

— Staff Writer Ruby Gonzales contributed to this report.