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NYC man in ‘Apple Jacks’ underwear accused of slashing girlfriend

A man brutally slashed his girlfriend inside a Lower Manhattan subway station during the morning rush Tuesday — and was later nabbed wearing Kellogg’s “Apple Jacks” underwear, according to cops and photos.

Alleged attacker Billy Hernandez, 50, was in custody hours later with charges pending against him after getting picked up on South Street, law-enforcement sources said.

Exclusive photos by The Post show Hernandez wearing a red “New York” t-shirt and Kellogg’s “Apple Jacks” underwear staring at the camera with a matter-of-fact expression on his face. 

The woman allegedly slashed by Hernandez was taken to Bellevue Hospital after the attack. William Farrington

Earlier photos from the crime scene had captured the 49-year-old victim — identified by law-enforcement sources as Hernandez’s girlfriend — with a bloody bandage wrapped around her head and face and wearing a blood-soaked shirt.

A pool of blood could be seen on the floor at a cordoned-off area of the Fulton Street station where the attack allegedly occurred.

Photos from the scene showed the 49-year-old victim with a bloody bandage wrapped around her head and face and wearing a blood-soaked shirt.

A splash of blood is seen on the lower level of the Fulton Street subway station after a 49-year-old woman was allegedly slashed by her boyfriend. William Farrington

A pool of blood could be seen on the floor at a cordoned-off area of the Fulton Street station.

The woman had been arguing with her boyfriend on the mezzanine level of the Nos. 4 and 5 train station just before 9:30 a.m. when the man slashed her on the right side of her face and upper right side of her back, police said.

The victim was taken to Bellevue Hospital, where she was listed in stable condition.

NYPD transit officers review a photo of the suspect. William Farrington

Her beau fled after the attack but was later nabbed, cops said.