U.S. Customs and Border Patrol agents were involved in a shooting Monday evening at the San Ysidro Port of Entry, located within the City of San Diego, which is north of the U.S.-Mexico border with Tijuana, officials said.

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An "officer-involved shooting" occurred at about 7:30 p.m. at the San Ysidro Port of Entry after the driver of a white pick-up truck attempting to enter the United States failed to stop for an inspection, a CBP spokesperson confirmed to Fox News. It was unclear if there were injuries.

Northbound vehicle and pedestrian lanes at the port of entry were shut down for approximately 30 minutes due to the incident. San Diego police officers were brought in to aide Customs and Border Protection agents.

The southbound vehicle and pedestrian lanes into Mexico were not affected. Officials are keeping the westbound vehicle exit from the port of entry closed Monday evening to preserve the scene. The eastbound exit lanes remain in service with minimal delays, the spokesperson said.

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The San Diego Police Department is the lead investigating agency into this shooting and will provide additional information and updates on the matter, the CBP spokesperson said.

U.S. Customs and Border Protection is cooperating with investigations by other law enforcement agencies. As per the CBP policy, the agency will also conduct an internal review of the incident.