US Immigration and Customs Enforcement announced Saturday that the agency and state law enforcement in Florida have arrested nearly 800 people over four days in a “massive, multi-agency immigration enforcement crackdown.

The four-day operation came as the Trump administration has sought to enlist local authorities in an immigration crackdown.

The Bucks County Sheriff’s Department is seeking to join a controversial partnership program where local police officers help ICE enforce federal immigration laws. The department would be the first in the Philadelphia region to collaborate with ICE under an initiative known as “287 (g),” named for a section of a 1996 immigration law.