There is limited Metro-North service into and out of Grand Central following a massive fire under the elevated tracks in Manhattan.

Service into Manhattan had been suspended overnight because of the fire.

Speaking to NY1 this morning, MTA Chairman and CEO Tom Prendergast says the fire caused significant damage to a vertical column that supports the center of the elevated span.

As a result, only two of the four tracks are in use.

Prendergast says he is confident full service will be back by Friday morning.

Flames broke out around 6:45 p.m. Tuesday at the Urban Garden Center on Park Avenue near 118th Street.

Investigators say there was heavy fire in several large construction trailers and some other vehicles.

More than 160 firefighters responded and it took them nearly two and a half hours to get the flames under control.

They worked quickly to remove propane tanks from the scene of the four-alarm fire.

"There was propane in there. There were also, some of the bolts popped out of the steel. That gave the impression of explosions. So yes, there were explosions going off when we got here," said FDNY Chief of Department James Leonard.

The MTA says more than 100 Metro-North personnel are working to determine the structural integrity of the tracks and make temporary repairs.

Metro-North service will be running on a Saturday schedule today.

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