Monday's fatal fire in southwest Baltimore shocked the city fire department and fire departments across the country as an investigation gets underway.

This investigation is personal for the federal, state and Baltimore City agents investigating an origin and cause of Monday's fire at a vacant rowhouse in the 200 block of South Stricker Street.

"It is a tragic loss for all of us because we are family and we lost a lot of family yesterday," Maryland State Fire Marshal Brian Geraci said. "There's a lot of damage to the structure. We may not be able to determine a cause."

City fire officials said the fire started around 6 a.m. and the building partially collapsed, trapping four firefighters inside. Three fire service members died, and a fourth remains hospitalized at Shock Trauma.... Read More: WBAL