An explosion took place in the sub-basement of 633 Third Avenue in Manhattan overnight. FDNY dispatched 25 fire and rescue units to the scene of the 42 story building.
Video from the scene showed many firemen and even a large hose line inside the building:
The building houses a number of offices including one for Governor Andrew Cuomo, The American Jewish Congress, China Airlines and others.
Reports indicate the explosion was caused by the failure of an electrical transformer in the sub-basement. No word on injuries. Fire contained.