Federal agents carried out search operations at several Zipps Sports Grill restaurants across the Phoenix metro area on Monday as part of an active criminal investigation, according to FOX 10 Phoenix.

Agents were seen entering multiple locations and removing boxes and materials, though authorities have not released details about the focus of the investigation or what evidence was collected.

The agency leading the operation has also not been publicly identified.Zipps Sports Grill, a popular locally owned chain with numerous Valley locations, remained open during portions of the activity, though some sites experienced temporary disruptions as agents conducted searches.

No arrests have been announced, and officials have not indicated whether the investigation involves employees, management, or business operations.