The cause of the derailment is not known.
All eastbound service out of Penn Station, Flatbush Avenue and east of Jamaica is suspended because of the derailment.
The trains involved were the 935 from Flatbush Avenue Brooklyn to Hempstead and the 934 from Penn Station to Huntington.
The LIRR says there were about 150 people on each train, about two dozen or so in the two derailed cars.
LIRR officials tell Eyewitness News the Huntington train was already in the station and the Hempstead train was just pulling in when the derailment occurred.
Right now, the LIRR is reporting 30 to 45 minute delays eastbound through Jamaica.
There are no reports of service disruptions westbound toward Penn Station.
Stay with Eyewitness News and 7online.com for additional information on this still developing story.