Federal immigration officers arrested at least 15 people — including children under the age of 10, one as young as 3— in San Francisco during their routine check-ins Wednesday according to attorneys, city officials and advocates for immigrants’ rights.

At least 15 people, including children as young as 3 years old, were detained Wednesday during their scheduled check-ins at the U.S. Immigration and Customs Enforcement office in San Francisco, according to immigration-rights advocates.

ICE detains 15, including a young child, in San Francisco, raising concerns over due process and sanctuary policies.