U.S. Immigration and Customs Enforcement (ICE) agents recently served notices of inspection to approximately 77 businesses across Northern California, including in Sacramento, according to ICE officials.

The process, which took place from Jan. 29 to Jan. 31, featured agents notifying businesses they are verifying their employees are legally able to work in the U.S. by auditing their hiring records.

The businesses are required to provide agents with the proper documents within three business days. An inspection of compliance will then be held by agents, ICE officials said.

"The actions taken this week reflect HSI’s (Homeland Security Investigations) stepped-up efforts to enforce the laws that prohibit businesses from hiring illegal workers," an email from an ICE spokesperson read. "HSI’s worksite enforcement strategy is focused on protecting jobs for U.S. citizens and others who are lawfully employed, eliminating unfair competitive advantages for companies that hire an illegal workforce, and strengthening public safety and national security."

No arrests have been made at this point, officials say. The notices of inspection were served in several Northern California cities, including Sacramento, San Francisco, and San Jose.