Amtrak service was temporarily disrupted overnight as crews battled a fire at an empty mattress warehouse in West Baltimore.

Subsurface levels were stacked with mattresses, the city's fire chief said, and the blaze had grown to seven alarms by early Tuesday.

More than 200 firefighters battled a massive blaze that broke out at a west Baltimore warehouse, disrupting Amtrak service in the area and prompting officials to move dozens of area residents. Commuter rail service was canceled Tuesday amid fears the building could collapse onto railroad tracks.