Researchers are still struggling to explain a flying object filmed off the coast of Long Island.

An unidentified man filmed the boomerang-shaped vessel as it zipped across the sky in April, brightly lit at around 10:30pm in Port Jefferson.

He then submitted the video to the Mutual UFO Network for investigation, and has left almost everyone stumped as to what he captured on his phone.

This is just one of many unexplained videos. To read more and view the video, click here.