WATCH: Lyon university EXPLOSION: Fireballs erupt in in France - AVOID area

Dramatic video footage shows flames and smoke billowing from the Mendel building on the LyonTech-la Doua campus in Villeurbanne. The fire started this morning when a gas bottle exploded in the roof of the building which was being renovated. The building was evacuated and three people were injured, officials said. People were urged to avoid the area as firefighters tackled the blaze.-- MORE...