The man who slashed a Brooklyn subway rider this week and threatened to “chop” her up on the train was arrested Thursday, NYPD officials said.

Ras Alula Nagarit, 37, of Manhattan, had attacked a 29-year-old woman on a No. 3 train Tuesday night, one day after a 71-year-old woman was slashed in the face on a D train in Manhattan, police said.

“I will chop you up on this train,” Nagarit told the 29-year-old woman, according to police.

Nagarit, of Third Avenue, was charged with second-degree assault, second-degree attempted assault, fourth-degree criminal possession of a weapon and third-degree menacing.

He had bumped into either the victim or her sister, and that set off an argument, police said.

He then attacked with an object wrapped in a cloth, cutting the victim on the right hand, police said. She was treated at a hospital and released, police said.

Nagarit’s arrest comes after police released three photos of the suspect Wednesday as they asked for the public’s help.

In the case of the D train attack, police arrested Damon Knowles, who was arraigned Wednesday on assault, resisting arrest and other misdemeanor charges and was held on bail.

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra and Matt Lindsay take a look top boys and girls basketball players on Long Island. Credit: Newsday

Sarra Sounds Off, Ep. 15: LI's top basketball players On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra and Matt Lindsay take a look top boys and girls basketball players on Long Island.

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra and Matt Lindsay take a look top boys and girls basketball players on Long Island. Credit: Newsday

Sarra Sounds Off, Ep. 15: LI's top basketball players On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra and Matt Lindsay take a look top boys and girls basketball players on Long Island.

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