The Nevsky Express, an express train en route from Moscow to St. Petersburg, was derailed Friday night near the town of Bologoye by what is believed to be a homemade bomb.
As of Monday morning, there have been 26 confirmed deaths and more than 50 people are still hospitalized.
The explosion, which is reported to have been roughly the equivalent of 7kg of TNT, is currently under investigation by Russian officials as a terrorist attack.