One of the victims is a street vendor who lost a leg in the accident.
It happened just after 11 a.m. at 8th Avenue and 11th Street.
A blue livery cab suddenly barreled out of control, jumped the curb and plowed into a car and three people in front of Junior's Deli.
At least one witness said the livery car was speeding and heard the driver say he didn't have any brakes.
Besides the street vendor, a woman suffered a broken leg, and another woman suffered minor injuries.
Police say the driver of the livery car was not charged.