A 14-year-old girl is in stable condition after a stabbing attack on a Manhattan subway train Sunday, police said. The victim was on a train heading south from Washington Heights when she was attacked by two other teenage girls, whom it’s believed she knew, according to authorities. The injured teenager was transported to a local hospital with a puncture wound to the chest. No arrests had been made in the case as of Sunday evening, according to the New York Post. A transit worker told the newspaper that the victim, whose sweater was visibly bloodied, had been “hysterical a bit.” The employee added: “I think she was more panicked than anything.” Authorities, seeking to curb a recent rise in the city’s subway violence, introduced on Saturday an overtime-shift initiative to place more officers in underground stations. Since Sept. 30, three people have died in New York transit stabbings—two on the subway and one on a city bus, according to WNBC.