The Roosevelt Island Twitterverse reports:

According to the MTA:

Service Change Posted: 12/30/2015 8:32AM

Due to a switch problem at 21 St-Queens Bridge, the following service changes are in effect:

F Subway trains are running on the E Subway line between Jackson Heights-Roosevelt Av and 5 Av-53 St, then via M Subway line to 47-50 St Rockefeller Center in both directions.

As an alternative customers are advised to use the N Subway, Q Subway, R Subway or Q102 service making nearby station stops.

Roosevelt Islander