A man slashed a stranger on the hand on a 3 train in Prospect Heights on Tuesday evening, police said. The victim, a 29-year-old woman, was on the train between Atlantic Avenue-Barclays Center and Grand Army Plaza at about 9:30 p.m. when she said her attacker told her, "I will chop you up on this train," and lashed out with an object wrapped in cloth.

Police said the two got into an argument after she bumped him at the Atlantic station and that they yelled at each other on the train. She said she did not see where the slasher fled to, but that she was treated at a local hospital and has since been released.

The NYPD describes the suspect as 5-foot-9 and 175 pounds, with short dark hair. He was last seen wearing a black jacket, green cap, green camo pants, and a backpack.

The attack was the latest in a series of unrelated slashing across the city over the last two months. A 71-year-old woman required 20 stitches after a man sliced her across the face on a D train on Monday, and last night, at almost exactly the same time as the 3 train attack, a 32-year-old man was cut in the face on a 6 train platform in East Harlem. The victim in the East Harlem case is not cooperating with cops, according to the Daily News.

Damon Knowles, 21, was arrested in connection with the D train attack and charged with assault with intent to disfigure and assault with intent to seriously injure. He was arrested as part of an unrelated domestic-violence investigation, the New York Post reported.

Seemingly random slashings are not unheard of, particularly on the subway, but seem to have picked up or become more publicized by police recently. Including the three that occurred in the last two days, there have by our count been nine publicized incidents carried out by separate suspects since the last week of November.

Police ask those with information about the latest unsolved slashings to call Crime Stoppers at (800) 577-8477, submit tips online at the Crime Stoppers website, or text information to 274637, then enter "TIP577".