The station is one of London”s busiest and was packed with commuters making their way home.
Emergency sirens and sounds have sounded throughtout the Underground station as people evacuated.
The station doors have been closed as large crowds gather outside.
Commuters are understood to have been evacuated due to “crowd control”.
Video filmed by commuters shows sirens being sounded over the PA system along with a recorded message to evacuate.
One witness said: “Just got evacuated from King”s Cross station at rush hour due to an emergency.”
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