(CNN) At least 23 people were injured, nine critically, after a partial roof collapse and explosion Wednesday in downtown Baltimore, according to the fire department. The incident occurred at the Baltimore Gas and Electric (BGE) building, according to a tweet from the Baltimore City Fire Department. The incident is likely construction related and not from natural gas, and occurred while crews were working on the building's air handling and boiler system, a release from BGE said. A witness told CNN affiliate WJZ the ground shook.

Source: CNN December 23, 2020 18:45 UTC