Latoya Skipwith, 25, and Joshua Carter, 2, killed when Lucresha Mints, 28, deliberately runs them down in Baltimore on May 27.

Authorities have made an arrest in connection with a hit-and-run in west Baltimore on Tuesday that killed a woman and a toddler and injured a 7-year-old girl.

Baltimore police said late Wednesday night that they arrested 28-year-old Lucresha Mints in connection with the case.

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Detectives said the intentional hit-and-run happened at Franklin and Monroe streets just after 9 p.m. Tuesday following an argument between Mints and 25-year-old Latoya Skipwith.

Police said the fight got so heated that Mints got into her car, aimed it at Skipwith and floored it, driving down the sidewalk and striking Skipwith, 2-year-old Joshua Carter and an unidentified 7-year-old girl as they sat on the steps of a church.

Witnesses told 11 News the victims ended up in a nearby stairwell, where on Wednesday, the boy's father sat in shock. He was nearby when the incident happened.

"I got the word and ran around the corner, and once I came, I seen my son a mess. It just hurt me so bad, I just broke down," father Joshua Carter Sr. said. "I just snapped."

Skipwith was killed, and police confirmed Wednesday that Joshua also died as a result of his injuries. Relatives of the victims told 11 News that Skipwith and Joshua were cousins.

The 7-year-old girl was taken to Johns Hopkins Hospital with non-life-threatening injuries. Police said she is expected to survive.

Police told 11 News that family members said the hit-and-run was sparked by an argument and that Mints knew her victims. Police said they were able to recover the vehicle used in the hit-and-run, which was a gray Acura.