Firefighters battle massive blaze breaks out at 3100 W. Monroe,
Firefighters worked for more than an hour Thursday afternoon to put out a huge blaze on Chicago's west side.
The fire broke out at a vacant building at 3100 West Monroe.
Flames could be seen shooting from the top floor of the three-story building and through the roof.
The cause of the fire was unknown late Thurday. No injuries were reported.