In a tense incident at a U.S. Coast Guard base in Alameda, California, law enforcement officers opened fire on a vehicle late Thursday night. This occurred shortly after President Donald Trump had retracted plans to deploy additional federal agents to San Francisco to address crime.

The Coast Guard reported the incident around 10 p.m., noting that a vehicle attempted to back into the base, which had previously been a focal point for protests against federal immigration officials. No Coast Guard personnel were injured in the event, as confirmed in a statement posted on X by the Coast Guard.

Footage from the scene revealed what seemed to be a U-Haul truck attempting to reverse into the base. The situation escalated when the driver ignored repeated verbal commands from Coast Guard personnel to halt their actions. The statement clarified, “When the vehicle’s actions posed a direct threat to the safety of Coast Guard and security personnel, law enforcement officers discharged several rounds of live fire.”

Following the incident, the Coast Guard announced that the FBI had initiated an investigation. However, the FBI has yet to provide any additional details, as they did not immediately respond to requests for comment.

The Coast Guard said the FBI was investigating. The FBI did not immediately respond to emails seeking further information.

Earlier Thursday, protesters had assembled at the island, with many singing hymns and carrying signs saying, “Protect our neighbors” and “No ICE or troops in the Bay.”

Trump had been threatening to send the National Guard to San Francisco, a move Mayor Daniel Lurie and Gov. Gavin Newsom said was unnecessary because crime is on the decline. Separately, U.S. Customs and Border Protection agents began arriving at the Coast Guard base in the region earlier Thursday for a possible ramp up of immigration enforcement, a move that drew several hundred protesters.

Trump said he called off the move after speaking to the mayor and several prominent business leaders who said they’re working hard to clean up the city.

Coast Guard Island is a 67-acre (27-hectare) human-made island formed in 1913 in the Oakland Estuary between Oakland and Alameda. It is federally owned, does not allow visits from the general public without an escort or specific government identification, and it has been home to the current base, Base Alameda, since 2012, according to a Coast Guard document from 2016.

Base Alameda provides a variety of services for Coast Guard activities throughout the West Coast.