Window cleaners left dangling after explosion in high-rise building

A worker stands on the end of a dangling scaffold as he waits to be rescued following an explosion at Baltimore Gas and Electric’s offices, Wednesday, Dec. 23, 2020. Twenty-one of the victims were brought to area hospitals following the explosion with a partial roof collapse. The city’s fire department tweeted that at least nine of the victims were in critical condition, while another was in serious condition. (Jerry Jackson/The Baltimore Sun via AP)

An explosion in a high-rise building in the US has injured 23 people and temporarily trapped a window cleaning crew on dangling scaffolding.

Twenty-one people were taken to hospital following the explosion in Baltimore, which caused a partial roof collapse.