LA JOLLA (CBS 8) - The search is on for two men wanted in a series of armed robberies at local taco shops.
The latest heists happened Sunday morning at a taco shop in La Jolla and one in Clairemont.
These robberies are not being taken lightly by San Diego police.
Even though the targeted taco shops are not filled with customers when the serial robbers strike - the fact they're armed and so brazen worries the police department.
So as they keep happening officers say it's even more important to catch the two men responsible.
"They are armed with guns, so they are dangerous," said Lt. Andra Brown.
Police have been on the trail of the so-called "backdoor bandits" since at least June, but Sunday morning they struck again.
They entered through the back of the El Cotixan restaurant in Clairemont at 1:35 a.m. Then, less than an hour later, they entered through the front of a small Rigoberto's in La Jolla.
It's the latest in a strip of related taco shop holdups.
"It's a series now that are probably up in the neighborhood of probably about a dozen cases. Where they have targeted taco shops, Mexican restaurants, that kind of thing," said Lt. Brown.
The 24-hour restaurants are a prime target for the robbers who police say are going after cash-only places with light security.
Their backdoor entrances are almost always the same but their locations can be unpredictable.
"Ocean Beach, in the North Park area there was one case, there have been some cases in the Kearney Mesa, Tierrasanta area. They are going city wide," she said.
On July 24th, they stormed into a Rancho Penasquitos MXN and robbed a cashier at gunpoint.
They fled in the same black sedan that has eluded authorities for almost two months.
"We're somewhat dismayed that they've got about a dozen cases on us so far so we're working very diligently," said Lt. Brown.
The robbery unit continues to interview the many victims and witnesses the bandits have left behind.
Police say it's important to catch the armed thieves before one day one of their robberies turns violent.
"To this point no one has been injured and there have been no shots fired, but they are displaying handguns so that's not to say that couldn't happen in the future," she said.
If you happen to be inside of one of these restaurants and it's being robbed - police urge you to be a "good witness" and try and observe the robbers.