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An investigation has been carried out on scene, D.C. Police Department said in a tweet.
An investigation into the cause of the explosion is under way.
An emergency services source said authorities were trying to identify the victims.
An iceberg floats in Andvord Bay, Antarctica, Feb 14, 2018. [Photo/Agencies]
An air purifier tower, Mukherjee said, filters PM 10 and PM 2.5 particles from the atmosphere. "And the air inside the tower is heated using solar energy, and the hot filtered air is released from the top," he said.
来源：资阳报