VIDEO: One person has died and at least three others are critically injured after several houses exploded in Baltimore on Monday morning, officials say. The explosion happened in the area of 6500 blk Reisterstown Rd 21215. Firefighters have rescued three critically injured patients. Special Rescue Operations are searching for more victims. Some of the trapped individuals might be children, Baltimore firefighters say. A second alarm has been called. This explosion happened on the 4-year anniversary of the Flower Branch Apartments explosion that left seven people dead, including two children.