Howard, from what I have read, suicides at that age are often "in clusters". As one person takes their life and their is an outpouring of grief and attention on them, others who are on the edge think that this may be the only way to get attention.
Some good steps is to work on the things that make these kids feel like they have no other choice. Is there a problem of a lack of future in your area? Economically depressed? No jobs? Are they heading for college, or are they headed for McJobs? Do they have interests and hobbies that keep them occupied and moving forward?
You can look at sites like this:
http://www.pubmedcentral.nih.gov/art...?artid=1488851
cluster suicides can be somewhat headed off if people get more actively involved before it reaches the tipping point.