Oakland Mayor Barbara Lee said in a press conference Thursday that the city is prepared for a surge in federal deployments even as U.S. President Donald Trump announced he is backing of a planned surge of federal agents into San Francisco.

"That does not mean we are not prepared," said Lee. "This is very fluid, and so there's no information we can bring to you today to bring you up to date on what plans they have in place, but we are moving forward with our plans and we are prepared."

President Donald Trump said Thursday that he’s backing off a planned surge of federal agents into San Francisco after speaking to the mayor, as protesters gathered outside a U.S. Coast Guard base where they were located.

Trump had been threatening to send the National Guard to the city to quell crime and U.S. Customs and Border Protection agents began arriving in the region early in the day for a possible ramp up of immigration enforcement.

The president posted on social media that Mayor Daniel Lurie told him Wednesday night that the city was making progress in reducing crime. Trump said he agreed to let San Francisco keep trying on its own.

Several hundred people, many singing hymns and carrying signs saying, “Protect our neighbors” and “No ICE or troops in the Bay,” referring to U.S. Immigration and Customs Enforcement, assembled just after dawn at Coast Guard Island in Alameda, California.

It was not clear if the president was canceling a National Guard deployment or calling off immigration enforcement by CBP agents.

Trump has deployed the Guard to Washington, D.C., and Memphis, Tennessee, to help fight what he says is rampant crime. Los Angeles was the first city where Trump deployed the Guard, arguing it was necessary to protect federal buildings and agents as protesters fought back against mass immigration arrests.

He has also said they are needed in Chicago and Portland, Oregon. Lawsuits from Democratic officials in both cities have so far blocked troops from going out on city streets.

Coast Guard Island is an artificial island formed in 1913, and the Coast Guard first established a base there in 1926. The island is owned by the federal government and is not open to the general public, so escorts or specific government ID cards are required for visitors. The Coast Guard is part of the Department of Homeland Security, which also houses ICE and CBP.