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 operation began Monday and targeted immigrants living in the country illegally with final deportation orders, according to an ICE official, who spoke on the condition of anonymity to discuss the operation.

ICE arrested around 780 migrants, including 275 with final removal orders, in a four-day operation which took place in Florida, according to data cited by multiple publications.