Canada's Wonderland's two biggest coasters are shut — with no reopening date

The two tallest, fastest roller coasters at Canada's Wonderland are closed indefinitely. Six Flags announced Monday it was temporarily shutting nine similar "hypercoasters" at six parks across North America — including Leviathan and Behemoth in Vaughan, Ont. — after a man was killed and others were injured on the Goliath ride at Six Flags Over Georgia.

A spokesperson for Canada's Wonderland confirmed Tuesday that both coasters are closed with no reopening timeline, according to reports. The park remains open on its regular fall schedule, Thursday through Sunday — with its two flagship rides shut. Ride manufacturer Bolliger & Mabillard, the Swiss firm that built all but one of the nine closed coasters, told ABC News it is "actively investigating the incident" and declined further comment. Six Flags said the closures were "out of an abundance of caution."

Police identified the victim as a 42-year-old Atlanta man; the cause of death has not been officially disclosed. Witness accounts of what happened on the ride remain unverified and are treated here as reports, not established fact.

For Ontario, the timing stings: the closures land in the middle of the park's Halloween Haunt season, when Leviathan and Behemoth are the main draw. Six Flags has not said what its investigation will examine or when the rides might reopen.