At least two people were feared killed and a number of others were unaccounted for after an explosion at a chocolate factory in Pennsylvania.
The blast injured at least six people and sent a plume of black smoke into the air above West Reading.
The explosion occurred in the afternoon in a building at the R.M. Palmer Company plant, at Second Avenue and Cherry Street.
Berks County fire crews remained at the scene as night fell in West Reading, about 60 miles (96 kilometres) northwest of Philadelphia.
The injured people were taken to Tower Hospital in West Reading, local media reported.
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