A Chinese airport was forced to shut down after a bizarre shape was seen streaking across the sky.
PHOTOS: Bizarre UFO sighting
Stunned locals in Zhejiang's provincial capital Hangzhou captured images and video of the object, which was described as a "comet-like fireball".
Xiaoshan airport officials spotted the UFO on their radar and chose to ground planes and divert incoming flights rather than risk a collision.
The shape disappeared off radar screens and officials have now launched an investigation into the sighting.
Some Chinese media reports said officials had indicated they knew what the craft was but could not disclose the details because of a "military connection".
An official statement is expected later today, the Daily Mail reports.
The airport was shut down for three to four hours during the incident and dozens of flights were diverted.
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