PHOENIX — Homeland Security and U.S. Customs and Border Protection are investigating Zipps Sports Grill restaurants.
LIVE VIDEO [viewer discretion is advised]: ABC15 is tracking the latest in this developing story
On Monday, ABC15 crews spotted agents at multiple restaurant locations.
According to a statement from HSI, it's part of a months-long criminal investigation with other federal partners.
Agents are in the process of serving federal search warrants at 15 locations across the Valley. HSI did not provide the exact locations; however, ABC15 was able to confirm agents at most of the Zipps in the Valley.
HSI says search warrants were authorized based on information presented to a federal judge and are being executed as part of a criminal investigation into felony violations of federal law.
Deputies with the Maricopa County Sheriff's Office were seen at a location in Tempe. MCSO says deputies were there to "assist ICE by keeping the peace 'only' during one of their operations."
RELATED: Phoenix PD addresses concerns over presence of ICE, other federal agencies
Dozens of protestors could be seen at the location on Central Avenue and Osborn Road.

A list of locations where federal agents can be seen is below:
-Central and Osborn Road
-Miller and Scottsdale Road

-32nd Street and Shea Boulevard

-University and Mill Avenue

-32nd Street and Indian School

-64th Street and Greenway

-Camelback and Miller Road

-16th Street and Bethany Home Road

-Warner Road and McClintock Drive

No other details have been provided.
Stick with ABC15 as we work to get more information on this developing story.
