A woman, who remained in custody Sunday, is accused of fighting in the street with another woman over a baby and then kidnapping the infant, police said.
A 22-year-old man, whom police called an accomplice, also was in custody.
The infant was found safe and in good health, police said.
Jail records identified the woman as 18-year-old Yaquelyn Rivera. The man was identified as William Jeremias Tobar-Ramos. Their hometowns were not listed.
The two were arrested Thursday after police located the 1-month-old baby.
Officers were dispatched to a kidnapping call shortly before 2:30 p.m. Thursday in the 5800 block of Manhattan Drive.
Two women were physically fighting in the street over the infant. One of the women was the mother of the baby, police said.
At some point, Tobar-Ramos stepped in and took the baby, police said.
Tobar-Ramos and Rivera are accused of jumping into a car and driving off with the infant.
The baby's mother called police to report her baby had been kidnapped in a stolen vehicle.
Officers found an address for Rivera and located her and the infant shortly after the kidnapping. A few minutes later, the male suspect returned and was taken into custody.
Police did not release any information on a motive for the kidnapping or the location of where the baby was found.
Tobar-Ramos was in the Mansfield Jail on Sunday in lieu of a $1,000 bail and facing a charge of kidnapping.
Rivera was at the Mansfield Jail on Sunday in lieu of $100,000 bail. She also had an immigration hold, according to jail records.