Police have released identification details of a woman accused of slashing two other 4-train passengers, both young women, in the face two separate times, reports NBC New York. There doesn’t appear to be a motive to the crimes, which is worrying other young women riding the train, they report.

Both times, the alleged slasher was last ween wearing a black hooded sweatshirt, a thick green bracelet and translucent plastic gloves, police said.

The first incident happened on Sept. 6 on the uptown 4 train near East 170th Street, according to police. The next was six days later on the downtown 4 train near Mount Eden Avenue.