The office of an Arizona sheriff known for his efforts against illegal immigrants has arrested 83 people during a two-day crime sweep targeting illegal immigrants.

Of those arrested, the Maricopa County Sheriff's Office said Saturday that 68 were illegal immigrants. Those who were not illegal immigrants were arrested for crimes including drug possession and theft.

The sheriff's office seized 725 pounds (330 kilograms) of marijuana and some methamphetamine during the operation, which ended Friday. It was the office's 18th such sweep.

Sheriff Joe Arpaio says his office's 17 previous sweeps resulted in more than 1,000 arrests. He says a recent rise in the number of human smuggling arrests prompted another sweep.