"The cause was\ officially determined to be accidental and preventable as a result of the roofing activities that were taking place on the roof of 35 William St." Chief Ayotte said. At 11:20 a.m. Friday, emergency responders were called to Vittoria Trattoria, housed in a century-old building at 35 William St. in Ottawa's historic ByWard Market. The flames had started on the northeast corner of the restaurant's roof, where a roofing crew was at work, the fire marshal's office said. Domenic Santaguida, owner of Vittoria Trattoria, said the property was being turned over to his insurers on Monday. Hallie Cotnam met with the co-owner of Vittoria Trattoria restaurant which suffered extensive damage in Friday's fire.

Source: CBC News April 15, 2019 16:41 UTC