If you’re heading into the city Wednesday, you might want to check your commute. A No. 6 train derailed around 4:15 a.m. this morning in upper Manhattan and it is still causing delays after the morning rush hour.

MTA officials say track work was being done and there was a loose rail. When the subway hit that rail, that triggered the derailment.

The train, which was carrying 100 passengers, was stuck in between stations at 120th Street well into the morning commute.

The FDNY and NYPD entered through the 116th Street station to retrieve the passengers.

No injuries were reported. The No. 4 and 6 trains were immediately suspended.

As a result of the train derailment, the MTA announced the following service changes:

- Uptown 6 trains are running express from the 42nd Street-Grand Central Station to the 125th Street Station.

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

- Downtown 4, 5 and 6 trains are running normal service.

- As an alternative, customers are advised to use M101, M102 or M103 bus making nearby station stops.

Bronx-bound passengers seeking service to stations between 42nd Street and 125th Street stations can get off at 125th Street and transfer to a downtown No. 4, 5 or 6 train.

Commuters in this area are urged to allow additional travel time. For the latest updates, visit www.mta.info.