Alien invasion? New Yorkers stunned as sky turns blue

An explosion at an electrical power station caused the skies over New York City to turn neon blue on Thursday night.

According to local media, the blast happened shortly after 9 pm when a transformer exploded at a facility in the Astoria neighbourhood of the borough of Queens.

New Yorkers took to social media to post pictures and videos of the strange phenomenon, as wild speculation swirled as to the cause of the eerie blue sky.

The Federal Aviation Administration (FAA) shut down nearby LaGuardia for an inspection after the downed transformer caused power outages at the airport, while the NYPD confirmed that no one was injured in the incident.

For a taste of the strange blue skies, watch the video above.