NORTH BERGEN, N.J. (AP) – It took about 100 firefighters several hours Monday to contain a huge early-morning fire at a northern New Jersey housing complex whose residents were still recovering from damage caused by Superstorm Sandy.

Fire officials said no major injuries were reported during the blaze at the Roc Harbour complex in North Bergen.

Firefighters faced icy conditions early Monday as they tried to get water lines to the complex, which is on the waterfront directly across the Hudson River from Manhattan, North Hudson Regional Fire Deputy Chief Charles Thomas said.

Gas lines that had ruptured during the fire had been fueling the blaze until the gas company shut them off, Thomas said. The only injuries reported were minor scrapes from slips and falls, Thomas added.

Investigators are looking into what started the fire, which burned in three buildings of the 17-building complex. Each building has four apartments, and the roof on one collapsed.

Residents were still struggling to recover from Superstorm Sandy, which flooded the area when the Hudson River surged over its banks.

The buildings jut out into the Hudson River just across from Manhattan.

(Copyright 2012 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)

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