Massive fire prompts hazmat situation in Chicago's East Side neighborhood

East Side fire prompts hazmat response. 

A building caught fire in Chicago's East Side neighborhood Sunday morning, prompting a hazmat response. 

The Chicago Fire Department (CFD) was called to a 3-11 alarm fire with a Level 1 hazmat near 103rd Street and Avenue O. 

It is not clear what the building was used for or what caused the fire. 

The fire was struck out as of 2 p.m. However, crews remained working at the scene. 

No injuries were reported. 

This is a developing story. Check back for updates.