The city's earthquake tracking administration tried to dispel rumors of an earthquake Thursday after microbloggers reported they felt the ground shake around noon near the Bund.

The Earthquake Administration of Shanghai Municipality announced on its microblog at 1:09 pm that it had not detected an earthquake in the city Thursday.

The microbloggers reported feeling a disturbance primarily around the Lujiazui Finance and Trade Zone in Pudong New Area and on the other side of the river near the Bund.

Concerned for their safety, some office workers fled their buildings, according to microblog posts. One building reportedly even organized an evacuation.

The bureau said it had checked its information twice but found no evidence that an earthquake occurred within the city limits, according to the microblog post.

In addition, it didn't collect any data indicating that a quake occurred in other parts of the country.

The cause of the shaking remained unknown Thursday.

The bureau said it would continue to monitor the situation.