Active-duty Marines are now stationed at the U.S.-Mexico border in southeastern San Diego County to assist with infrastructure improvements and detection and monitoring.

San Diego County health officials recently issued new water contamination advisories that affect recreational activities on local beaches.

Border Patrol agents uncovered a sophisticated narcotics smuggling tunnel connecting Tijuana and San Diego, featuring electrical and ventilation systems.

U.S. Border Patrol agents shut down the construction of a 2,918-foot-long tunnel connecting Tijuana and San Diego with the aid of Department of Homeland Security officials and Mexican authorities.

US Border Patrol agents recently discovered and disabled a nearly 3,000-foot-long narcotics smuggling tunnel sitting beneath the US-Mexico border. Agents found the tunnel — which linked Tijuana ...

The San Diego Sector Border Patrol said agents discovered a drug smuggling tunnel measuring 2,918 feet in total length, connecting San Diego and Tijuana in April.

U.S. Customs and Border Patrol says they found an intricate tunnel leading from Tijuana to San Diego.

U. S. Border Patrol agents discovered a tunnel for smuggling narcotics running from Tijuana to San Diego, the department announced Wednesday.

U.S. Border Patrol agents shut down the construction of a 2,918-foot-long tunnel connecting Tijuana and San Diego with the aid of Department of Homeland Security officials and Mexican authorities.