John Street in downtown Toronto remains closed as officials from the city are working to determine why a large piece of glass fell from a condo building above the TIFF Bell Lightbox building on Tuesday.

The glass plummeted to the street around 7:30 p.m. last night, shattering on the road below, police say.

Fortunately, no one was injured.

The panel appeared to have come from the 27th floor of the Festival Tower, the condo building on top of the showcase site of the Toronto International Film Festival.

Home owner Misha Tazler told CTV Toronto on Wednesday she came home last night to find out it was her balcony.

"We saw and it just looked like an impact had hit the balcony … it just looked crazy. And now the panel is gone," Tazler said.

The Festival Tower building is owned by Daniels Buildings Corp., not TIFF.

The area around the building has been closed as a precaution until city building inspectors arrive to investigate what happened.

A section of John Street from Adelaide to King Street also remains closed to traffic while police investigate. Pedestrian traffic will be limited to the east side of John Street.

This is the second incident of falling glass this week in downtown Toronto. On Monday, glass from the 35th floor of a condo building at 37 Grosvenor St. crashed to the street.

Again, no one was hurt.

Grosvenor Street near Bay Street remains closed while repairs are made to the building.

After Monday's incident, the City of Toronto issued an order to the owner of the Bay and Grosvenor Streets building to remove all glass balcony facings. So far nearly four-fifths of the panels on the north side of the building have been removed and the removal continued Wednesday afternoon, CTV's Scott Lightfoot reported.

The city said the investigation will look into everything from the product to the people who installed the panel.

"The fabricator may be out of business now and there's no reason to believe that it's related specifically to the installation or the glass panel until I know otherwise," a city official told CTV Toronto.

It's still not clear what caused the glass to fall, but the condo developers say they are replacing it all.

With a report from CTV's Scott Lightfoot.