A minor derailment of a subway train in Harlem is causing some service disruptions.

NYC Transit says No. 6 trains are running express between Grand Central Station and 125th Street.

It says there’s also limited service in both directions on the Nos. 4, 5 and 6.

Riders are advised to use bus service where possible.

The derailment occurred on a No. 6 train between the 125th and 116th street stations at 4:14 a.m. Wednesday.

Passengers were evacuated safely and there were no injuries.