Authorities say two cars of a subway train derailed in lower Manhattan but no one was injured.

The Metropolitan Transportation Authority says the derailment occurred at 3:52 a.m. EDT Monday on the northbound No. 6 train between Brooklyn Bridge and Canal Street.

Spokeswoman Judie Glave says an empty train backed up to the disabled train and 19 people were safely evacuated.

There was no immediate word on the cause.

As a result, the Nos. 4, 5 and 6 are running express only in both directions between Brooklyn Bridge and 14th Street.

The MTA says commuters should expect extensive delays during the morning rush.