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Images posted on social media appeared to show smoke inside NYC’s Penn Station on Tuesday, as US citizens take to the polls. Witnesses reported smoke alarms going off as commuters scrambled to evacuate the smoked-filled building.

TWITTER Penn Station has been evacuated

A Long Island Rail Road spokesperson say the smoky conditions have been extinguished in Penn Station's LIRR concourse and the main waiting area. No injuries were reported, and service was not affected. A spokesperson for railway company Amtrak has released a statement claiming that the smoke was a result of an "accidental lighting of a flare inside an office."

TWITTER The concourse was filled with smoke

Worried commuters took to social media in reaction to the incident. Amanda Scurti said: “Having a great time in Penn Station which is now on fire? Ok.” Twitter user Gavin said: “Fire at Penn station and everyone just pulls out their phone to start video taping instead of f**king walking.” Sammy said: “Oh god I'm in Penn Station.”

TWITTER The smoke has now been cleared according to officials