[UPDATES BELOW] A man was fatally struck by an oncoming R train in Brooklyn during morning rush hour on Monday, suspending R train service between 36th Street and 95th Street in both directions. It was not immediately clear how the man wound up on the trackbed.

Pretty much stuck in #BayRidge because of an accident on the R line — Claudia (@cstuartnyc) July 11, 2016

The FDNY responded to the 77th Street station in Bay Ridge at 9:37 a.m. and pronounced the victim dead on arrival, according to a spokesman.

.@MTA Due to FDNY activity, R train service suspended both directions btwn 36 St & 95 St, BK. Consider alt routes. https://t.co/ENIxXVnNZ4 — NYCEM - Notify NYC (@NotifyNYC) July 11, 2016

#ServiceAlert: b/d there is no R train service b/t 36 St(Bklyn) to 95 St(Bklyn) due to an unauthorized person on the tracks. — NYCT Subway (@NYCTSubway) July 11, 2016

The MTA did not immediately respond to a request for comment, but MTA.info suggests that Bay Ridge and Sunset Park commuters use the B37 or B63 bus as an alternative until further notice.

[UPDATE 1:00 p.m.]: The victim jumped in front of the oncoming R train, according to a spokeswoman for the MTA. The authority also confirmed that an MTA employee on the scene was uncooperative when asked for a statement by the police, and was taken into custody.

Pete Donohue, spokesman for the Transport Workers Union Local 100, said that the employee in question was a train operator, and would have been positioned in the very front of the train when the victim allegedly jumped.

The NYPD confirmed Monday that an MTA worker was taken into custody at the scene this morning, and brought to Lutheran Hospital for an evaluation.