(KTRH) Firefighter investigators are on scene investigating the official cause of the fire that killed four firefighters, in southwest Houston. The 5-alarm fire that took the lives of the lives of those firefighters, happened at the Southwest Inn motel Friday afternoon, and caused the biggest loss in the Houston Fire Department's 175 year history.

Officials say the four firefighters who died at the Southwest Inn were looking for people they thought were still trapped in the burning building. Houston Fire Chief Terry Garrison says early invesigations give insight into what caused the fatalities.

"We do know there was a collapse and that is what caused our firefighters to get trapped," Garrison said.

The identities of the firefighters have been released. They are Captain Emergency Medical Technician (EMT) Matthew Renaud, 35, of Station 51; Firefighter EMT Robert Garner, 29, of Station 68; Probationary Firefighter Anne Sullivan, 24, of Station 68; and Engineer Operator EMT Robert Bebee, 41, of Station 51.

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Come out to Outlaw Dave's Worldwide Headquarters this Friday at 7 for Southern Star Brewing Pint Night Honoring The Fallen Firefighters. Southern Star will be in house with their brand new Double IPA, Valkyrie.

 During the pint night we will be accepting donations for to the Texas Association of First Responders for the fallen firefighters from last week's deadly fire. With each donation you can enter your name to win great prizes. It doesn't matter how much you donate; please donate as much as your conscience tells you to give.

Some of the items that will be raffled off are:

A 40 guest private party at Southern Star Brewing Co.

Be a producer for a day. Ever wondered what is like to run a real radio show? Get your chance to sit behind the board, select topics, bumps and be on the air. 

There will be plenty more great items to win. Please spread the word to everyone you know.

Click here for a map to Outlaw Dave's Worldwide Headquarters.


For info and to donate to the Texas Association of First Responders click here.