The incidents took place in the late hours of Saturday in the city of Lauro de Freitas, the Globovision TV channel reported on Sunday.
Four criminals first opened fire from a car at a 15-year-old teenager in the city centre. Then, they drove to another area, where they started shooting at people on the street.
The perpetrators of the attack have not been identified yet.
Meanwhile, media reported that 11 were killed in the north of Brazil on Sunday, after seven gunmen opened fire in a pub in the city of Belem.