Police said a group of people were riding electric scooters in the intersection of Pacific Avenue and 4th Street at about 12:08 a.m. when one of the riders was struck by a dark-color sedan.
The baby boy and his mother, who was not injured, were just about to cross the street around 11:30 a.m. Thursday near Long Beach Boulevard and 67th Street in Long Beach when they were struck by a car.
Police said officers responded to the crash on a service road that provides access to the bed of the Los Angeles River north of Willow Street.
Police believe a driver in a red sedan was headed southbound on Atlantic Avenue at a high speed when he or she hit the woman in a marked crosswalk.
Police do not yet have the driver in custody, a spokeswoman said.
Officers were first called to the area of 12th Street and Long Beach Boulevard, near St. Mary Medical Center, at about 2:25 a.m. on Dec. 15, police said.
Detectives believe a driver in a 2003 Mercury sedan was going east on PCH shortly before 7:15 p.m. when he hit a parked vehicle before hitting a pedestrian who was trying to cross the street outside a crosswalk.
Charges were filed against a man Friday for a 2018 road-rage incident that involved two other vehicles in Long Beach.
Officers were called to the area of Anaheim Street and St. Louis Avenue at about 11:50 a.m. on Sunday about the hit-and-run crash, spokeswoman Allison Gallagher said.
Officers were called to the scene just after 1:40 a.m. about a person down near Woodruff Avenue and Willow Street.