2 Philadelphia firefighters killed in early morning warehouse fire

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PHILADELPHIA (CNN) - Two Philadelphia firefighters died while battling a blaze at a warehouse this morning in Philadelphia. Two other firefighters were rushed to the hospital in critical condition.

The walls of the warehouse collapsed and embers ignited four homes nearby. Fire crews got the blazes under control just after five o'clock this morning. Some people were evacuated to a church shelter.

The names of the fallen firefighters have not been released.