After an explosion rocked a steel plant outside Pittsburgh, workers scrambled into the wreckage alongside firefighters directing streams of water.

• At least one person is dead, 10 injured and one unaccounted for in an explosion at the Clairton Coke Works in Pittsburgh, Pennsylvania. The cause of the explosion is unknown and officials are investigating, US Steel said.

Police released surveillance video of the two suspects who stole more than $700,000 from an armored truck near Philadelphia. Authorities tell NBC News that they are investigating if this latest robbery is connected to a string of similar incidents that have recently happened across Pennsylvania.

Police are investigating whether the armed robbery of a Brinks truck on Tuesday outside a Philadelphia-area store is related to four other attacks on armored vehicles in and around the city this summer.