Updates below—two people were hit by trains in separate incidents; one was killed. A person was apparently hit by a northbound train on the Lexington Avenue line at 125th Street in Manhattan. The FDNY tells us that they received a call around 4:30 p.m. about a person who was "under the train" and that they are responding to the situation. The MTA's website says, "Due to police investigation at the 125 Street Station, northbound 6 train service is terminating at the 86th Street Station. Southbound 6 train service is terminating at the 3 Avenue-138 Street. Northbound 5 trains are running on the 2 line from the Nevins Street Station to the 149 Street-Grand Concourse Station. Please expect delay in 4, 5 and 6 train service at this time."

We'll update with more details as we get them.

Update 5:45 p.m.: The MTA tells us that around 4 p.m., a northbound 5 train struck a person who was removed to Harlem Hospital. Then, around the same time, a northbound 6 train fatally struck another person.

The FDNY says that there was a DOA at the station when they responded. The person they transported to the hospital was on already on the platform by the time they got there.

The NYPD did not have any information at this time.

The 4, 5, and 6 service is still delayed/terminated as stated above.

NBC New York reports, "A source tells NBC 4 New York that the fight may have been between two homeless men."

Update 6:20 p.m.: The MTA updated service changes:

Due to police investigation at the 125 Street Station, northbound 6 train service is terminating at the 86 Street Station.

Northbound 4, 5 and 6 train service is bypassing the 125 Street Station.

Southbound 4, 5 and 6 train service are running local from the 125 Street Station to the Canal Street Station.

Southbound 6 train service is terminating at the 3 Avenue-138 Street Station.

Customers are advised to take 4 or 5 train service to the 138 Street-Grand Concourse Station where you can connect to shuttle buses to the 3 Avenue-138 Street Station and connect to 6 train service.

Some northbound 5 trains are running on the 2 line from the Nevins Street Station to the 149 Street-Grand Concourse Station.

Please expect delay in 4, 5 and 6 train service at this time.

WABC 7 reports, "According to Deputy Police Commissioner Paul Browne, at around 5:30 p.m., two men were fighting on the platform at the East 125th train station. The two men rolled off the platform onto the train tracks. They were both struck by an uptown 5 train. One is dead, the other was injured. It's unclear at this point if they knew each other, or what they were fighting about." (It's unclear why the 6 train would be terminated if both victims were hit by the 5, so clearly details are only emerging.)

The MTA still says the two people were hit by separate trains at the station.

Update, 7:30 p.m.: According to 1010Wins, the incidents were separate. Paul Browne now says a 50-year-old homeless man crawled onto the platform with a broken pelvis and gashes on his face after being hit by a northbound No. 5 train. He was unable to tell police how he got on the tracks.

The deceased was on the northbound No. 6 train, using the space in between cars as a bathroom, when the train was leaving the station he slipped and was killed by the train. It is illegal to walk between cars—the fine is $75.

The NYPD tells us at this time that the incidents are not related, and no criminality is suspected. They are still investigating where the injured man got his injuries, and at this time he's in stable condition at Harlem Hospital Center.

Update, 8:20 p.m.: According to Paul Browne, the man who was killed was defecating between two subway cars when he fell on the tracks and was struck by the train. Earlier the NYPD had said the two men were involved in a fight, but the two incidents were separate—according to the NY Times, Browne said the initial information they received had been wrong. The other man, who is currently in stable condition, had pulled himself up from the tracks just prior to the fatal accident.

The MTA is reportedly investigating sliding platform doors in the wake of the two fatal subway shovings in Manhattan and Queens last month.