MISSION VIEJO, Calif.—An armed man wearing an orange or red wig and all-black clothing held up a Nordstrom store at the Shops at Mission Viejo Mall after closing time and got away before deputies arrived, authorities said today. The robbery occurred at about 8:30 p.m. Saturday in the mall off Marguerite Parkway and Shops Boulevard, according to Orange County Sheriff’s Department spokeswoman Carrie Braun. The store closed at 8 p.m. The suspect brandished a weapon and fled with an unknown amount of cash, Braun said. No shots were fired. One person suffered a minor injury while attempting to flee the mall and was treated by Orange County Fire Authority paramedics. Members of the sheriff’s SWAT team searched for the suspect in and around the mall and removed some people who had sheltered in place when they learned of the robbery, she said. Most of the shops inside the mall were …