STATEN ISLAND, N.Y. — Police have arrested a teenager, who, they say, fired a bullet through an apartment door Wednesday at the West Brighton Houses, wounding a woman.

And, in a twist, they also busted the victim's son on Thursday after he entered her apartment with an illegal handgun, said a law enforcement source.

Barry Lovelace, 17, of the 2200 block of Richmond Terrace, Elm Park, shot and wounded Denise Taylor, 44, as she peered out the peephole of her second-floor apartment at 820 Henderson Ave., said police and a law enforcement source.

Lovelace and several friends were fighting with Ms. Taylor's son, Dean Afflick, 22, and his brothers in the hallway outside Ms. Taylor's apartment around 2 p.m., said the source.

Afflick told authorities he and his brothers sought safety in his mother's apartment, when they heard a shot ring out, the source said.

Police allege Lovelace fired a gun, with the bullet piercing Ms. Taylor's door and striking her in the leg.

She was transported to Richmond University Medical Center with non-life-threatening injuries and underwent surgery.

Several minutes before the shooting, Lovelace had punched a 20-year-old male several times outside the apartment building, said the source.

Lovelace was arrested Thursday and charged with felony counts of first-degree assault, criminal weapon possession, criminal firearm possession and reckless endangerment, said a spokesman for District Attorney Daniel Donovan. He's also accused of misdemeanor assault.

After the shooting, cops stepped up patrols in and around the building, said the source. On Thursday, officers were on the second floor at about 5 p.m., when they saw Afflick enter Ms. Taylor's apartment with a gun.

Police allege Afflick ditched the weapon, a loaded .22-caliber handgun, which they recovered outside in a bag on the ground, underneath the apartment's rear window, said a criminal complaint.

Cops also found additional bullets in the bag, the complaint said.

Afflick told cops he lives on Fulton Street, in Hempstead, Long Island, said the complaint. He said he had found the gun last year on the beach and brought it to his mother's apartment for protection, said the source.

He was charged with criminal weapon possession, criminal firearm possession and ammunition possession.