(KRON) – As of Tuesday morning, ICE agents have made as many as 50 arrests throughout Northern California during their latest immigration sweeps.

Marisela Esparza with the San Francisco Immigrant, Legal and Education Network tells KRON4 two arrests were made Monday night, bringing the total to about 50 arrests in recent raids.

The locations of the arrests are unavailable at this time.

KRON4 learned that ICE agents were conducting operations throughout the Bay Area over the weekend.

Oakland Mayor Libby Schaaf warned residents of large-scale raids by immigration agents in the San Francisco Bay Area, marking the latest escalation of tensions between California officials and the Trump administration.

Mayor Schaaf’s unusual alert this weekend also follows months of criticism of her decision to allow Oakland police to direct traffic during an Immigration and Customs Enforcement raid in August.

She says it’s her “duty and moral obligation” to warn families. But critics say her warning likely has caused panic.

California is a “sanctuary state” that limits cooperation with federal immigration authorities.Stay with KRON4 News for updates.

Here is a statement from the ACLU:

Increased ICE activity has been reported throughout the Bay Area, the Central Coast, and in the Central Valley. Local rapid response hotlines have confirmed that ICE has arrested at least 37 people over the past few days in cities including Monterey, Oakland, Fresno, Napa, San Francisco, Sacramento, Santa Clara, and Salinas.

Contrary to statements provided by ICE, agents are aggressively intimidating families in their homes and using tactics of racial profiling to detain people in public spaces.

Reports from rapid response networks suggest that ICE enforcement is terrorizing communities of color. The targeting of cities and states that refuse to use their limited resources to fuel the Trump administration’s deportation machine is cruel and inhumane.

In many of the arrests reported so far, people opened their doors for ICE and answered questions. We urge everyone in California to know their constitutional rights, including the right to remain silent and the right to not open the door unless agents have a warrant signed by a judge. We urge people not to answer questions, and not to sign anything without speaking to an attorney.

In all of its immigration enforcement activities, ICE must abide by the U.S. Constitution which guarantees basic rights to everyone in the United States. Yet it appears that ICE selectively targets Latino neighborhoods, subjects people engaged in innocent activities to coercive questioning, and tricks people into opening their doors by misrepresenting themselves as local police.

The people of California should make sure they document any interactions with ICE agents and call the rapid response hotlines to report activity.

Together we must resist this blatant racism. We need strong families, not families torn apart by deportation. We need communities that trust each other, not communities living in fear of police every second of the day.

Reports of abusive tactics by ICE are nothing new, they are part of a pattern of fear-mongering and retaliation. We will do everything we can to protect community members from federal abuses of power.

— Angelica Salceda, ACLU of Northern California attorney

And here is a statement from ICE:

“On Sunday, Feb. 25, U.S. Immigration and Customs Enforcement’s (ICE) Enforcement and Removal Operations (ERO) San Francisco Fugitive Operations Team arrested ICE fugitive Armando Nuñez-Salgado<https://www.ice.gov/most-wanted/nunez>, 38, a citizen of Mexico and documented Sureño gang member, who has been previously removed by ICE on four prior occasions. Over the past 18 years he has accumulated criminal convictions in California that have resulted in more than 15 years of prison sentencings. His criminal convictions include assault with a deadly weapon (statutorily enhanced because of his gang member status), burglary, hit-and-run causing injury and evading a peace officer.”