A 1,000-foot skyscraper began shaking in the southern Chinese city of Shenzhen, sending people fleeing for safety.

Per BBC News, SEG Plaza was captured in footage swaying from side to side on Tuesday, seemingly for no apparent reason.

The video, which was posted to Chinese social media platform Weibo, also showed how nearby shoppers desperately sprinted as fast as they could from the apparently unstable building.

Local authorities are yet to determine the cause of wobble, which ultimately led to an evacuation of the 73-story building. An investigation into the incident is underway.

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As reported by China's state-run Global Times newspaper, the local government of Shenzhen's Futian district - where the huge building is located - was made aware of the inexplicable swaying from people inside the building at 12:31PM local time. It goes on to report that everyone inside SEG Plaza had been evacuated by 2:00PM.

An earthquake has been ruled out as a potential cause of the mysterious occurrence.

Shenzhen's emergency management bureau confirmed this, per AFP, stating: "After checking and analyzing the data of various earthquake monitoring stations across the city, there was no earthquake in Shenzhen today. The cause of the shaking is being verified by various departments."

According to the Global Times, officials confirmed there were no "safety abnormalities" detected either in the building or the surrounding area.

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The outcome of the preliminary investigation also showed that there were no ground cracks nearby and there was no indication of any curtain wall panels falling off and causing damage.

A number of concerned social media users have since taken to Twitter to share their thoughts on the ordeal, with one writing: "Holy moly!!! You can actually see the building swaying! This is the SEG Plaza, Shenzhen, China."

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Another added: "Crazy! Today in China Down [this] happened."

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The building will remain closed off while authorities continue their investigation.

Building collapses are relatively common in China. In May last year, 10 people lost their lives in Quanzhou when a hotel being used as a coronavirus quarantine facility collapsed, according to BBC News.

Featured image credit: Leonid Serebrennikov / Alamy

People flee in panic as huge skyscraper mysteriously begins to shake