(CBS News) A “computer glitch” may have been behind the fast-spreading fire that ravaged Notre Dame, the cathedral’s rector said Friday. Speaking during a meeting of local business owners, rector Patrick Chauvet did not elaborate on the exact nature of the glitch, adding that “we may find out what happened in two or three months.”

On Thursday, Paris police investigators said they think an electrical short-circuit most likely caused the fire. French newspaper Le Parisien has reported that a fire alarm went off at Notre Dame shortly after 6 p.m. Monday but a computer bug showed the fire’s location in the wrong place.

The paper reported the flames may have started at the bottom of the cathedral’s giant spire and may have been caused by an electrical problem in an elevator. Chauvet said there were fire alarms throughout the building, which he described as “well protected.”

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