Two people who were struck by a C train at Broadway Junction in Brooklyn on Thursday evening have died in an apparent murder-suicide, authorities said.

According to police, a 54-year-old man jumped onto the tracks, pulling Cynthia Raiser, 42, from the platform with him just before 5 p.m. on Thursday. Raiser was found dead at the scene, while the man, whose name has not yet been released, was transported to Brookdale Hospital. He was pronounced dead at the hospital, authorities said.

A source tells the Post that the man had a big gash on his head, and that Raiser—reportedly his girlfriend—was struggling and shouting, "No, no, no" prior to the incident. The man is believed to have a history of domestic violence, according to the tabloid.

An NYPD spokesperson said that an investigation is ongoing.

In the aftermath of the alleged homicide, the MTA announced that all trains were bypassing Broadway Junction. But at least one subway full of passengers did stop at the station following the incident, leading to a harrowing, nearly hour-long experience without power, culminating in an evacuation onto the subway tracks.

Malak Lunsford told Gothamist he arrived at the station while emergency responders were still on the scene, and that he was told by a police officer to get on a north-bound C train that was running on the express tracks. But shortly after leaving the station, the power was cut from the train, Lunsford said, leaving passengers in hot cars with little explanation from MTA officials.

"We were stuck in there for about an hour or so. Eventually they knew we weren’t going to move anytime soon—people were getting sick overheated and asthmatic people were on there," Lunsford told Gothamist. "Miscommunication between the conductors and higher ups because they let the train take off instead of just waiting."

Nearly an hour later, Lunsford says that he and the other passengers were escorted to the front of the train car, where they were evacuated in the dark, and told to walk along the tracks.

A spokesperson for the MTA did not respond to a request for comment.

If someone you know exhibits warning signs of suicide: do not leave the person alone; remove any firearms, alcohol, drugs or sharp objects that could be used in a suicide attempt; and call the U.S. National Suicide Prevention Lifeline at 800-273-TALK (8255) or take the person to an emergency room or seek help from a medical or mental health professional.