Customs and Border Protection officers at the San Ysidro Port of Entry arrested a traveler today after officers discovered roughly 23 pounds of suspected fentanyl hidden inside a vehicle. The seizure was announced by Sidney Aki, director of CBP’s San Diego Field Office, who publicly credited his team for catching the load. Officials say large shipments like this remain a primary target of border interdiction efforts in Southern California.
According to a post by Director of Field Operations Sidney Aki, the traveler was apprehended for attempting to smuggle 23 lbs. of fentanyl concealed in a vehicle at the busy San Ysidro crossing. Aki added that without the dedication of our officers, thousands of innocent lives could be lost, using his official X account to spotlight the bust.
Our @CBP officers don't miss. Recently, at the #SanYsidroPOE a traveler was apprehended for attempting to smuggle 23 lbs. of fentanyl concealed in a vehicle.
— Director of Field Operations Sidney Aki (@DFOSanDiegoCA) March 12, 2026
Without the dedication of our officers thousands of innocent lives could be lost.#CBP #StopDrugTrafficking #Narco pic.twitter.com/XkI2cwW9Aj
Seizures fit an intensified border effort
Thursday’s seizure is part of a broader, long-running push at southern ports of entry that officials say is aimed squarely at disrupting cartel supply lines before they move north. State and federal agencies have expanded joint operations, ramping up inspections and intelligence-sharing at key crossings. A recent California press release underscored how large those efforts have become. As announced by the Office of Governor Gavin Newsom, coordinated counterdrug operations have removed tens of thousands of pounds of fentanyl, with an estimated street value of roughly $506 million.
How big is 23 pounds?
On paper, 23 pounds might not sound like a cartel kingpin’s stash. In fentanyl terms, it is enormous. The Drug Enforcement Administration notes that about 2 milligrams of fentanyl can be a potentially lethal dose, depending on a person’s tolerance. By that measure, roughly 23 pounds, which works out to about 10,433 grams, could represent more than 5 million potentially lethal doses. That simple bit of math helps illustrate the scale of what CBP says it intercepted. The DEA also cautions that field identifications are only preliminary until laboratory testing confirms the content and purity of the suspected narcotics.
Where the case goes from here
When CBP officers uncover suspected narcotics at a port of entry, the standard playbook kicks in. Seized material and any suspects are typically handed off to Homeland Security Investigations for forensic testing and potential federal prosecution. That process, outlined in past CBP briefings and in local reporting on cases where agents snag a million fentanyl pills in one jaw-dropping day, usually unfolds over weeks, not days. Whether federal charges are filed in this San Ysidro case will depend on laboratory results and prosecutors’ review of the full evidence.
Why it matters locally
San Ysidro is one of the busiest land border crossings in the world, and that sheer volume shapes what officers can realistically check. Tens of thousands of vehicles and pedestrians stream through daily, which limits how many travelers and cars can receive intensive secondary screening. That high throughput is a big reason traffickers keep targeting ports of entry, researchers say. The American Immigration Council notes that the San Ysidro crossing alone averages nearly 40,000 passenger vehicles a day. For inspectors trying to spot one fentanyl-packed car in that daily crush, Thursday’s bust underscores both the challenge and the stakes.
