Santa Rosa police said Saturday that no arrests had been made in connection with the armed robbery of two Garda Armored Car Service employees who were held up late Thursday night at an operational hub in southwest Santa Rosa.

Garda has offered a $100,000 reward in the case.

Police said at least two masked men with heavy weapons overpowered two employees as an armored vehicle returned to the business around 10:45 p.m. Thursday.

The suspects disarmed and bound the employees and made off with an undisclosed amount of cash, police said.

Investigators have surveillance tape from the low-profile, one-story building in which numerous other businesses are housed off Northpoint Parkway.

The FBI is also involved in the investigation.

Anyone with information about the case can call police Det. Ryan Corcoran or Sgt. Steve Fraga at the department's violent crimes investigations unit, 543-3590.

-- Mary Callahan