The West Calexico Port of Entry is taking extra security measures due to an unconfirmed threat, according to a statement from the U.S. Department of Homeland Security and Customs and Border Protection.
Additional CBP officers have been called in, as well as officers from other law enforcement agencies, as a precaution.
DHS says the threat was directed towards the Mexican side of the border.
First Street near the Downtown Port of Entry was blocked off by caution tape Wednesday evening.
Law enforcement officers stood by the Port of Entry with rifles.
While the threat is on the Mexican side, CBP officials say they are taking all precautions to keep travelers and CBP employees safe.
Local, state and federal law enforcement agencies as well as Mexican government officials are working together.
CBP is keeping a close eye on the Calexico East Port of Entry as well.
CBP and DHS released a statement Wednesday evening, stating "CBP has received unconfirmed threat information related to the Mexican side of the Calexico, Calif., port of entry."
"Out of an abundance of caution, CBP is deploying additional law enforcement resources to ensure the safety of the traveling public and personnel in and around the port."
"We are working closely with our state, local and federal law enforcement partners and the government of Mexico. We ask our federal, state, local partners, and the public to remain vigilant and to report any suspicious activity to local law enforcement."