Main Page | See live article | Alphabetical index Petri Gerdt, the 19-year-old chemistry college student suspected of making and planting the explosive device that killed him and six others Friday evening outside a McDonald's restaurant in the mall in Vantaa, about 10 miles north of Helsinki. Gerdt acted alone and ruled out any links to terrorist groups. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.