Notre Dame investigation under way

French police scientists and other expert investigators are starting to examine Notre Dame Cathedral for the first time since its devastating fire.

An official said teams from three agencies were entering the monument to take samples and search for what caused the blaze.

Police made a prelimi - nary visit last week but were not able to conduct a thorough examination until the cathedral’s structure was secured.

Officials believe the fire was possibly caused by a short circuit linked to renovation work under way before the fire.

The cathedral will remain closed.