The city of El Cajon has filed a lawsuit against California challenging the state's sanctuary law, arguing that the policy conflicts with federal immigration enforcement requirements.

El Cajon's lawsuit targets California's Senate Bill 54, which limits cooperation between local law enforcement and federal immigration authorities. The city contends that the sanctuary law violates federal statutes by restricting compliance with immigration enforcement.

The legal challenge argues that California's sanctuary policies interfere with federal immigration law and potentially compromise public safety by limiting information sharing between local and federal authorities.

Separately, federal immigration officials have requested that Montana authorities detain an undocumented immigrant charged with sexual assault. Immigration and Customs Enforcement officials have linked the case to broader policy discussions about immigration enforcement and detention practices.

The El Cajon lawsuit represents the latest legal challenge to California's sanctuary state policies, which have faced ongoing opposition from some local governments and federal authorities since their implementation.