Numerous businesses and individuals in the Ottawa-Gatineau area have reported receiving threatening emails demanding payment in bitcoin, Ottawa police said Thursday.

As of Thursday afternoon there had been more than 10 reported cases of emailed bomb threats, police said.

Dozens of bomb threats — all believed to be hoaxes — were reported in major cities across Canada and the United States on Thursday.

So far all the threats have been deemed unfounded.

Police in Ottawa and Gatineau are investigating.

Ottawa police are advising anyone who receives such an email not to respond to the demands, and to call 613-236-1222 ext. 7300 or report the threat online.

Anonymous tips can be submitted by calling Crime Stoppers toll-free at 1-800-222-8477 (TIPS), or by downloading the Ottawa police app.