(CNN) -- The holiday weekend buzz at a California fair was stinging.
A July Fourth fireworks show disturbed a hive and angry bees swarmed a crowd of spectators at the Alameda County Fair on Friday night. About 100 people were stung, some multiple times, said Alameda County spokeswoman Aisha Knowles.
The bees were not discriminating -- in waves of attacks, they stung young and old alike. The victims ranged from 6 months to 60 years and were treated by firefighters on the scene. None of the injuries were serious, she said.
A normal reaction to a bee strong results in pain, swelling and redness. But some people are susceptible to a severe allergic reaction. Knowles said no one at the county fair had to be rushed to a hospital.
CNN's Rick Martin contributed to this report.