Multiple houses exploded early Monday morning in Baltimore, Maryland.”We are borderline mass casualty at this point,” a local law enforcement scanner announced. “This explosion has affected at least a three block radius up here.”At least one woman died in the mysterious blasts and at least two people are confirmed to be injured, according to the Baltimore City Fire Department.The responding firefighting ladder also noted that several individuals were trapped after the blast:

Several outlets and citizens obtained footage of the blast:

According to the Baltimore Sun, gas is believed to be the cause of the explosion that occurred in Northwest Baltimore’s Reisterstown Station neighborhood.

Citing union officials, the Sun reported that Special Rescue Operations units are currently in the process of locating and extracting survivors from the rubble.

The outlet clarified, however, that the “exact cause” of the “major” explosion was still unclear. Baltimore Gas and Electric and the Baltimore Office of Emergency Management also currently have officials on the scene in an apparent effort to ascertain the cause of the incident.

“It knocked me across the bed,” 77-year-old Moses Glover told the Sun. “I came downstairs and saw all of the front of the houses across the street, they were on the ground. I had a picture window downstairs, the glass is in the chair now.”

Major Watkins Jr., an 88-year-old U.S. Army vet, said the blast “sounded like Korea.” His home was destroyed.

This is a breaking news story…

[image via screengrab/NBC News]