Authorities say bees have attacked a group of roadside workers in Brazil, killing one and sending nine others to the hospital.

Authorities say the workers were cleaning a road in the interior city of Andradina in Sao Paulo state when the bees attacked.

Firefighter Davis Henrique says most of the workers escaped by running from the bees, but 65-year-old Antonio Pereira da Silva fell and was stung nearly 500 times.

The other workers were later released from the hospital without serious injuries.

Henrique said Tuesday that the noise from the workers' lawnmowers likely caused Monday's attack.