Firefighters investigate after a school bus in Toronto is thrown into a 10-foot-deep sinkhole.

Toronto Fire Services is investigating after an underground sinkhole was discovered under a school bus parked in Toronto.

Officials say that the sinkhole—roughly 10-feet wide and 4-feet deep—was found underneath a parked bus in the Beaches on Monday afternoon.

After 4:30 p.m., firefighters were summoned to Queen Street East or Balsam Avenue.

The school bus was waiting outside a school on the Beaches to collect students and take them home.

Officials state that there were no children aboard the bus when it suddenly collapsed into the road.

It is unclear what caused the sinkhole, and firefighters are looking into a possible gas leak or water main break in the vicinity.

Toronto has been experiencing a lot of sinkhole problems lately. The city is now working to fix its roads, water mains and streets. Businesses are being damaged and street closures are common.

Just two months ago the construction of pipes along Dundas Avenue between Brock Avenue & Sheridan Avenue was a major problem. Contractors discovered a sinkhole under the streetcar tracks.

A massive sinkhole caused by a water leak in 2018 engulfed the entire city. TTC vehicle Toronto’s Port Lands.