Definition: In this task, you are given a news article. Your task is to classify the article to one out of the four topics 'World', 'Sports', 'Business', 'Sci/Tech' if the article's main topic is relevant to the world, sports, business, and science/technology, correspondingly. If you are not sure about the topic, choose the closest option. Note that URLs in the text have been replaced with [Link].
Input: Chechen warlord behind school hostage-taking, says FSB Chechnya #39;s notorious warlord ShamilBasayev is behind the school hostage-taking in southern Russia that has led to the deaths of over 100 people, Russia #39;s Federal Security Service (FSB) said.

World