City inspectors have ordered a downtown condo building to complete a safety review after a pane of glass fell to the ground Wednesday morning.

It happened around Simcoe Street near Adelaide Street just before 8 a.m.

The pane fell from the 26th floor, according to Bruce Hawkins from the City Planning department. Initial reports said the pane fell from the 25th floor.

The building must now retain the services of a professional engineer to determine the cause of the glass breaking, and any links to a previous failure, Hawkins told CTV Toronto. The building must also complete a detailed review of the glazing and balcony system to determine what, if any, remedial action is required.

There were no injuries.

It was not immediately clear what caused the window to fall, however, Hawkins said it is not believed to have been from any sort of impact.

Police said a large shard of glass was hanging from the balcony where the pane fell from.

As a precaution, police closed a portion of Simcoe Street, Nelson Street and Duncan Street.

While the area remained closed, guests at the nearby Shangri-La Hotel have been instructed not to use its Simcoe Street doors.

This is the second time glass has shattered at this building. In August 2015, another pane of glass from a 26th floor balcony shattered.

Hawkins could not confirm whether the glass that fell Wednesday morning was from the condo unit with the same problem in 2015.