A woman was shot Saturday while driving a car in North Park with her baby in the back seat. San Diego Police investigators say the woman was shot by the father of her child who was a passenger in her car, police confirmed.

Police say that some sort of argument broke out between the mother and father as they drove down westbound El Cajon Boulevard with their 6-month-old baby and the man's brother also inside the vehicle.

The 19-year-old father, sitting in the front passenger seat, shot the mother, 18, while she drove the vehicle just before 1:30 p.m., according to the San Diego Police Department (SDPD).

The mother pulled over on Iowa Street to call 911 and the suspect fled on foot. Officers arrived at the scene and found the woman suffering from a single gunshot wound to her upper body. Police say the bullet lodged in the driver side door.

She was rushed to Scripps Mercy Hospital where, as of 11 p.m. Saturday, she is reported to be in stable condition.

#SDPD investigating a shooting that happened in this car on Iowa St in #NorthPark. #NBC7 pic.twitter.com/P0e0onpixr — Ashley Matthews (@ashleyNBC7) December 17, 2016

Police found the man hiding in an alley shortly after and arrested him. The weapon, a .45 caliber handgun, was retrieved from a trash bin in the alley.

The baby and the brother of the shooter were unharmed and the child is now with family members, according to police.

The brother of the shooter was questioned by police but was not taken into custody, SDPD said.

SDPD Domestic Violence Detectives are investigating the incident.