LAGUARDIA AIRPORT - The National Transportation Safety Board is working to figure out what caused a plane to skid off the runway at LaGuardia Airport Thursday.

Delta flight 1086 had just touched down on runway 13 in snow and poor visibility when the MD-88 aircraft suddenly lurched sideways. An official says the plane, which was coming in from Atlanta, did not make contact with an icy bay but instead came to rest on an embankment next to the water.

Passengers say the left wing of the plane was torn up when it crashed into a chain link fence.

Emergency workers quickly evacuated the 127 passengers and five crew members. Port Authority rescue crews had drilled for this type of situation twice in the past three weeks. Officials say things did not go as smoothly as planned, however. The inflatable emergency chutes on the plane failed to deploy, forcing rescue workers onto the wings to help the passengers down.

The executive director of the Port Authority of New York and New Jersey said at a news conference Thursday that six people suffered non-life threatening injuries, and two of them were taken to a hospital.

Patrick Foye says the airport runway was plowed and two other pilots reported good braking conditions minutes before the Delta plane landed. Foye says the pilot did everything he could to slow the aircraft.

Foye says the airplane was leaking a gallon of fuel a minute after the crash. The leak has since stopped.

Federal authorities have been interviewing passengers at the LaGuardia Plaza Hotel, which is next to the airport, in hopes of uncovering what caused the incident.

AP wires contributed to this report.