A Harlem building that was on a controversial development site (see post below) collapsed this morning.

At least five people were injured at West 100th Street and Broadway, where the building came down shortly after 9 a.m. One, an infant taken to St. Luke's Roosevelt, is injured critically according to New York 1.

The collapse occurred at the site of a former Gristedes, which was being torn down to make way for a residential tower. The Extell Development Corporation currently plans to build two residential towers, 31 and 36 stories tall, respectively.

Firefighters are now sifting through the rubble; it's unclear whether anybody might be trapped inside.

The MTA has announced service changes:

-- The No. 1 train is suspended from 42nd Street to 137th Street.

-- The No. 2 train is running on the No. 5 line from 149th Street Grand Concourse in the Bronx to Nevins in Brooklyn.

-- No. 3 service is suspended between Chambers Street and 148th Street.

-- The M104 bus is running on West End Avenue above 96th Street.