An explosion rocked a cargo ship carrying coal in Baltimore, causing a fire and sending a stream of smoke into the sky but leaving no injuries, authorities said Monday evening.

U.S. Coast Guard crews and firefighters from the city of Baltimore were among those who responded to the incident, and the fire was extinguished on the still-moving vessel, Coast Guard Petty Officer 1st Class Matthew West said.

The cause of the blast and subsequent fire was under investigation, he said. Video from the scene showed black smoke still billowing from the vessel, which authorities said is named W-Sapphire.

The cargo ship was carrying coal in a channel outbound from Baltimore Harbor near the site of last year's Francis Scott Key Bridge collapse , West said.

In a statement, the Baltimore City Fire De

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